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Finding the Fourth Proportional to 115,387.17, 159,234.21 and 65,086.17

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Solution

The fourth proportional to 115,387.17, 159,234.21 and 65,086.17 is: 89,818.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,387.17 : 159,234.21 = 65,086.17 : x
  2. Step 2: Convert to fraction form
    115,387.17/159,234.21 = 65,086.17/x
  3. Step 3: Cross multiply
    115,387.17x = 159,234.21 × 65,086.17
  4. Step 4: Simplify right side
    115,387.17x = 10,363,944,861.88
  5. Step 5: Solve for x
    x = 10,363,944,861.88/115,387.17
  6. Step 6: Final answer
    x = 89,818.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.