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Finding the Fourth Proportional to 119,780.58, 165,294.90 and 66,070.56

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Solution

The fourth proportional to 119,780.58, 165,294.90 and 66,070.56 is: 91,176.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,780.58 : 165,294.90 = 66,070.56 : x
  2. Step 2: Convert to fraction form
    119,780.58/165,294.90 = 66,070.56/x
  3. Step 3: Cross multiply
    119,780.58x = 165,294.90 × 66,070.56
  4. Step 4: Simplify right side
    119,780.58x = 10,921,126,608.14
  5. Step 5: Solve for x
    x = 10,921,126,608.14/119,780.58
  6. Step 6: Final answer
    x = 91,176.10

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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.