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Finding the Fourth Proportional to 136,758.97, 188,724.90 and 76,328.52

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Solution

The fourth proportional to 136,758.97, 188,724.90 and 76,328.52 is: 105,331.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,758.97 : 188,724.90 = 76,328.52 : x
  2. Step 2: Convert to fraction form
    136,758.97/188,724.90 = 76,328.52/x
  3. Step 3: Cross multiply
    136,758.97x = 188,724.90 × 76,328.52
  4. Step 4: Simplify right side
    136,758.97x = 14,405,092,304.15
  5. Step 5: Solve for x
    x = 14,405,092,304.15/136,758.97
  6. Step 6: Final answer
    x = 105,331.97

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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.