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Finding the Fourth Proportional to 99,951.66, 137,919.96 and 64,190.07

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Solution

The fourth proportional to 99,951.66, 137,919.96 and 64,190.07 is: 88,573.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,951.66 : 137,919.96 = 64,190.07 : x
  2. Step 2: Convert to fraction form
    99,951.66/137,919.96 = 64,190.07/x
  3. Step 3: Cross multiply
    99,951.66x = 137,919.96 × 64,190.07
  4. Step 4: Simplify right side
    99,951.66x = 8,853,091,886.80
  5. Step 5: Solve for x
    x = 8,853,091,886.80/99,951.66
  6. Step 6: Final answer
    x = 88,573.74

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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.