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Finding the Fourth Proportional to 92,666.88, 138,735.45 and 86,781.56

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Solution

The fourth proportional to 92,666.88, 138,735.45 and 86,781.56 is: 129,924.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,666.88 : 138,735.45 = 86,781.56 : x
  2. Step 2: Convert to fraction form
    92,666.88/138,735.45 = 86,781.56/x
  3. Step 3: Cross multiply
    92,666.88x = 138,735.45 × 86,781.56
  4. Step 4: Simplify right side
    92,666.88x = 12,039,678,084.62
  5. Step 5: Solve for x
    x = 12,039,678,084.62/92,666.88
  6. Step 6: Final answer
    x = 129,924.28

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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.