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Finding the Fourth Proportional to 72,992.20, 109,491.90 and 38,000.20

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Solution

The fourth proportional to 72,992.20, 109,491.90 and 38,000.20 is: 57,002.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,992.20 : 109,491.90 = 38,000.20 : x
  2. Step 2: Convert to fraction form
    72,992.20/109,491.90 = 38,000.20/x
  3. Step 3: Cross multiply
    72,992.20x = 109,491.90 × 38,000.20
  4. Step 4: Simplify right side
    72,992.20x = 4,160,714,098.38
  5. Step 5: Solve for x
    x = 4,160,714,098.38/72,992.20
  6. Step 6: Final answer
    x = 57,002.17

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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.