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Finding the Fourth Proportional to 131,699.88, 181,381.14 and 113,789.16

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Solution

The fourth proportional to 131,699.88, 181,381.14 and 113,789.16 is: 156,713.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,699.88 : 181,381.14 = 113,789.16 : x
  2. Step 2: Convert to fraction form
    131,699.88/181,381.14 = 113,789.16/x
  3. Step 3: Cross multiply
    131,699.88x = 181,381.14 × 113,789.16
  4. Step 4: Simplify right side
    131,699.88x = 20,639,207,560.44
  5. Step 5: Solve for x
    x = 20,639,207,560.44/131,699.88
  6. Step 6: Final answer
    x = 156,713.94

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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.