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Finding the Fourth Proportional to 72,168.40, 108,320.10 and 36,655.12

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Solution

The fourth proportional to 72,168.40, 108,320.10 and 36,655.12 is: 55,016.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,168.40 : 108,320.10 = 36,655.12 : x
  2. Step 2: Convert to fraction form
    72,168.40/108,320.10 = 36,655.12/x
  3. Step 3: Cross multiply
    72,168.40x = 108,320.10 × 36,655.12
  4. Step 4: Simplify right side
    72,168.40x = 3,970,486,263.91
  5. Step 5: Solve for x
    x = 3,970,486,263.91/72,168.40
  6. Step 6: Final answer
    x = 55,016.96

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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.