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Finding the Fourth Proportional to 84,149.40, 126,103.80 and 61,787.32

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Solution

The fourth proportional to 84,149.40, 126,103.80 and 61,787.32 is: 92,592.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,149.40 : 126,103.80 = 61,787.32 : x
  2. Step 2: Convert to fraction form
    84,149.40/126,103.80 = 61,787.32/x
  3. Step 3: Cross multiply
    84,149.40x = 126,103.80 × 61,787.32
  4. Step 4: Simplify right side
    84,149.40x = 7,791,615,843.82
  5. Step 5: Solve for x
    x = 7,791,615,843.82/84,149.40
  6. Step 6: Final answer
    x = 92,592.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.