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Finding the Fourth Proportional to 81,381.52, 121,924.65 and 60,086.97

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Solution

The fourth proportional to 81,381.52, 121,924.65 and 60,086.97 is: 90,021.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381.52 : 121,924.65 = 60,086.97 : x
  2. Step 2: Convert to fraction form
    81,381.52/121,924.65 = 60,086.97/x
  3. Step 3: Cross multiply
    81,381.52x = 121,924.65 × 60,086.97
  4. Step 4: Simplify right side
    81,381.52x = 7,326,082,992.24
  5. Step 5: Solve for x
    x = 7,326,082,992.24/81,381.52
  6. Step 6: Final answer
    x = 90,021.46

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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.