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Finding the Fourth Proportional to 119,387.87, 164,751.78 and 65,672.88

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Solution

The fourth proportional to 119,387.87, 164,751.78 and 65,672.88 is: 90,626.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,387.87 : 164,751.78 = 65,672.88 : x
  2. Step 2: Convert to fraction form
    119,387.87/164,751.78 = 65,672.88/x
  3. Step 3: Cross multiply
    119,387.87x = 164,751.78 × 65,672.88
  4. Step 4: Simplify right side
    119,387.87x = 10,819,723,877.73
  5. Step 5: Solve for x
    x = 10,819,723,877.73/119,387.87
  6. Step 6: Final answer
    x = 90,626.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.