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Finding the Fourth Proportional to 131,874.95, 181,987.18 and 71,447.11

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Solution

The fourth proportional to 131,874.95, 181,987.18 and 71,447.11 is: 98,596.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,874.95 : 181,987.18 = 71,447.11 : x
  2. Step 2: Convert to fraction form
    131,874.95/181,987.18 = 71,447.11/x
  3. Step 3: Cross multiply
    131,874.95x = 181,987.18 × 71,447.11
  4. Step 4: Simplify right side
    131,874.95x = 13,002,457,434.46
  5. Step 5: Solve for x
    x = 13,002,457,434.46/131,874.95
  6. Step 6: Final answer
    x = 98,596.87

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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.