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Finding the Fourth Proportional to 136,677.78, 188,631.72 and 80,089.11

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Solution

The fourth proportional to 136,677.78, 188,631.72 and 80,089.11 is: 110,532.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,677.78 : 188,631.72 = 80,089.11 : x
  2. Step 2: Convert to fraction form
    136,677.78/188,631.72 = 80,089.11/x
  3. Step 3: Cross multiply
    136,677.78x = 188,631.72 × 80,089.11
  4. Step 4: Simplify right side
    136,677.78x = 15,107,346,572.57
  5. Step 5: Solve for x
    x = 15,107,346,572.57/136,677.78
  6. Step 6: Final answer
    x = 110,532.57

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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.