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Finding the Fourth Proportional to 119,838.80, 165,376.32 and 66,124.88

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Solution

The fourth proportional to 119,838.80, 165,376.32 and 66,124.88 is: 91,251.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,838.80 : 165,376.32 = 66,124.88 : x
  2. Step 2: Convert to fraction form
    119,838.80/165,376.32 = 66,124.88/x
  3. Step 3: Cross multiply
    119,838.80x = 165,376.32 × 66,124.88
  4. Step 4: Simplify right side
    119,838.80x = 10,935,489,314.84
  5. Step 5: Solve for x
    x = 10,935,489,314.84/119,838.80
  6. Step 6: Final answer
    x = 91,251.66

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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.