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Finding the Fourth Proportional to 99,641.70, 137,427.78 and 63,835.04

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Solution

The fourth proportional to 99,641.70, 137,427.78 and 63,835.04 is: 88,042.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,641.70 : 137,427.78 = 63,835.04 : x
  2. Step 2: Convert to fraction form
    99,641.70/137,427.78 = 63,835.04/x
  3. Step 3: Cross multiply
    99,641.70x = 137,427.78 × 63,835.04
  4. Step 4: Simplify right side
    99,641.70x = 8,772,707,833.41
  5. Step 5: Solve for x
    x = 8,772,707,833.41/99,641.70
  6. Step 6: Final answer
    x = 88,042.53

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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.