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Finding the Fourth Proportional to 72,330.92, 108,402.13 and 40,308.71

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Solution

The fourth proportional to 72,330.92, 108,402.13 and 40,308.71 is: 60,410.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,330.92 : 108,402.13 = 40,308.71 : x
  2. Step 2: Convert to fraction form
    72,330.92/108,402.13 = 40,308.71/x
  3. Step 3: Cross multiply
    72,330.92x = 108,402.13 × 40,308.71
  4. Step 4: Simplify right side
    72,330.92x = 4,369,550,021.55
  5. Step 5: Solve for x
    x = 4,369,550,021.55/72,330.92
  6. Step 6: Final answer
    x = 60,410.54

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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.