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Finding the Fourth Proportional to 72,713.90, 109,073.28 and 20,118.98

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Solution

The fourth proportional to 72,713.90, 109,073.28 and 20,118.98 is: 30,179.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,713.90 : 109,073.28 = 20,118.98 : x
  2. Step 2: Convert to fraction form
    72,713.90/109,073.28 = 20,118.98/x
  3. Step 3: Cross multiply
    72,713.90x = 109,073.28 × 20,118.98
  4. Step 4: Simplify right side
    72,713.90x = 2,194,442,593.49
  5. Step 5: Solve for x
    x = 2,194,442,593.49/72,713.90
  6. Step 6: Final answer
    x = 30,179.14

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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.