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Finding the Fourth Proportional to 72,146.52, 108,220.50 and 25,399.80

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Solution

The fourth proportional to 72,146.52, 108,220.50 and 25,399.80 is: 38,099.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,146.52 : 108,220.50 = 25,399.80 : x
  2. Step 2: Convert to fraction form
    72,146.52/108,220.50 = 25,399.80/x
  3. Step 3: Cross multiply
    72,146.52x = 108,220.50 × 25,399.80
  4. Step 4: Simplify right side
    72,146.52x = 2,748,779,055.90
  5. Step 5: Solve for x
    x = 2,748,779,055.90/72,146.52
  6. Step 6: Final answer
    x = 38,099.95

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.