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Finding the Fourth Proportional to 72,209.78, 108,280.48 and 42,232.69

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Solution

The fourth proportional to 72,209.78, 108,280.48 and 42,232.69 is: 63,329.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,209.78 : 108,280.48 = 42,232.69 : x
  2. Step 2: Convert to fraction form
    72,209.78/108,280.48 = 42,232.69/x
  3. Step 3: Cross multiply
    72,209.78x = 108,280.48 × 42,232.69
  4. Step 4: Simplify right side
    72,209.78x = 4,572,975,568.61
  5. Step 5: Solve for x
    x = 4,572,975,568.61/72,209.78
  6. Step 6: Final answer
    x = 63,329.04

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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.