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Finding the Fourth Proportional to 235,989.90, 354,036.12 and 86,229.97

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Solution

The fourth proportional to 235,989.90, 354,036.12 and 86,229.97 is: 129,363.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,989.90 : 354,036.12 = 86,229.97 : x
  2. Step 2: Convert to fraction form
    235,989.90/354,036.12 = 86,229.97/x
  3. Step 3: Cross multiply
    235,989.90x = 354,036.12 × 86,229.97
  4. Step 4: Simplify right side
    235,989.90x = 30,528,522,798.06
  5. Step 5: Solve for x
    x = 30,528,522,798.06/235,989.90
  6. Step 6: Final answer
    x = 129,363.68

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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.