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Finding the Fourth Proportional to 159,959.43, 240,086.75 and 81,129.02

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Solution

The fourth proportional to 159,959.43, 240,086.75 and 81,129.02 is: 121,768.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,959.43 : 240,086.75 = 81,129.02 : x
  2. Step 2: Convert to fraction form
    159,959.43/240,086.75 = 81,129.02/x
  3. Step 3: Cross multiply
    159,959.43x = 240,086.75 × 81,129.02
  4. Step 4: Simplify right side
    159,959.43x = 19,478,002,742.49
  5. Step 5: Solve for x
    x = 19,478,002,742.49/159,959.43
  6. Step 6: Final answer
    x = 121,768.39

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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.