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Finding the Fourth Proportional to 72,429.30, 108,643.95 and 36,999.90

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Solution

The fourth proportional to 72,429.30, 108,643.95 and 36,999.90 is: 55,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,429.30 : 108,643.95 = 36,999.90 : x
  2. Step 2: Convert to fraction form
    72,429.30/108,643.95 = 36,999.90/x
  3. Step 3: Cross multiply
    72,429.30x = 108,643.95 × 36,999.90
  4. Step 4: Simplify right side
    72,429.30x = 4,019,815,285.61
  5. Step 5: Solve for x
    x = 4,019,815,285.61/72,429.30
  6. Step 6: Final answer
    x = 55,499.85

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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.