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Finding the Fourth Proportional to 72,937.20, 109,430.10 and 65,098.20

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Solution

The fourth proportional to 72,937.20, 109,430.10 and 65,098.20 is: 97,668.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,937.20 : 109,430.10 = 65,098.20 : x
  2. Step 2: Convert to fraction form
    72,937.20/109,430.10 = 65,098.20/x
  3. Step 3: Cross multiply
    72,937.20x = 109,430.10 × 65,098.20
  4. Step 4: Simplify right side
    72,937.20x = 7,123,702,535.82
  5. Step 5: Solve for x
    x = 7,123,702,535.82/72,937.20
  6. Step 6: Final answer
    x = 97,668.99

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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.