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Finding the Fourth Proportional to 159,687.90, 239,531.85 and 75,420.36

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Solution

The fourth proportional to 159,687.90, 239,531.85 and 75,420.36 is: 113,130.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,687.90 : 239,531.85 = 75,420.36 : x
  2. Step 2: Convert to fraction form
    159,687.90/239,531.85 = 75,420.36/x
  3. Step 3: Cross multiply
    159,687.90x = 239,531.85 × 75,420.36
  4. Step 4: Simplify right side
    159,687.90x = 18,065,578,358.47
  5. Step 5: Solve for x
    x = 18,065,578,358.47/159,687.90
  6. Step 6: Final answer
    x = 113,130.54

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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.