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Finding the Fourth Proportional to 99,696.80, 137,503.79 and 63,890.14

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Solution

The fourth proportional to 99,696.80, 137,503.79 and 63,890.14 is: 88,118.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,696.80 : 137,503.79 = 63,890.14 : x
  2. Step 2: Convert to fraction form
    99,696.80/137,503.79 = 63,890.14/x
  3. Step 3: Cross multiply
    99,696.80x = 137,503.79 × 63,890.14
  4. Step 4: Simplify right side
    99,696.80x = 8,785,136,393.63
  5. Step 5: Solve for x
    x = 8,785,136,393.63/99,696.80
  6. Step 6: Final answer
    x = 88,118.54

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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.