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Finding the Fourth Proportional to 72,480.30, 108,720.45 and 47,532.30

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Solution

The fourth proportional to 72,480.30, 108,720.45 and 47,532.30 is: 71,298.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,480.30 : 108,720.45 = 47,532.30 : x
  2. Step 2: Convert to fraction form
    72,480.30/108,720.45 = 47,532.30/x
  3. Step 3: Cross multiply
    72,480.30x = 108,720.45 × 47,532.30
  4. Step 4: Simplify right side
    72,480.30x = 5,167,733,045.54
  5. Step 5: Solve for x
    x = 5,167,733,045.54/72,480.30
  6. Step 6: Final answer
    x = 71,298.45

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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.