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Finding the Fourth Proportional to 99,664.70, 137,502.79 and 63,874.45

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Solution

The fourth proportional to 99,664.70, 137,502.79 and 63,874.45 is: 88,124.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,664.70 : 137,502.79 = 63,874.45 : x
  2. Step 2: Convert to fraction form
    99,664.70/137,502.79 = 63,874.45/x
  3. Step 3: Cross multiply
    99,664.70x = 137,502.79 × 63,874.45
  4. Step 4: Simplify right side
    99,664.70x = 8,782,915,084.72
  5. Step 5: Solve for x
    x = 8,782,915,084.72/99,664.70
  6. Step 6: Final answer
    x = 88,124.63

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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.