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Finding the Fourth Proportional to 72,387.65, 108,603.90 and 32,440.29

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Solution

The fourth proportional to 72,387.65, 108,603.90 and 32,440.29 is: 48,670.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,387.65 : 108,603.90 = 32,440.29 : x
  2. Step 2: Convert to fraction form
    72,387.65/108,603.90 = 32,440.29/x
  3. Step 3: Cross multiply
    72,387.65x = 108,603.90 × 32,440.29
  4. Step 4: Simplify right side
    72,387.65x = 3,523,142,011.13
  5. Step 5: Solve for x
    x = 3,523,142,011.13/72,387.65
  6. Step 6: Final answer
    x = 48,670.49

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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.