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Finding the Fourth Proportional to 136,780.65, 188,842.64 and 88,407.90

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Solution

The fourth proportional to 136,780.65, 188,842.64 and 88,407.90 is: 122,058.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,780.65 : 188,842.64 = 88,407.90 : x
  2. Step 2: Convert to fraction form
    136,780.65/188,842.64 = 88,407.90/x
  3. Step 3: Cross multiply
    136,780.65x = 188,842.64 × 88,407.90
  4. Step 4: Simplify right side
    136,780.65x = 16,695,180,790.82
  5. Step 5: Solve for x
    x = 16,695,180,790.82/136,780.65
  6. Step 6: Final answer
    x = 122,058.06

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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.