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Finding the Fourth Proportional to 99,672.54, 137,559.78 and 56,658.49

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Solution

The fourth proportional to 99,672.54, 137,559.78 and 56,658.49 is: 78,195.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,672.54 : 137,559.78 = 56,658.49 : x
  2. Step 2: Convert to fraction form
    99,672.54/137,559.78 = 56,658.49/x
  3. Step 3: Cross multiply
    99,672.54x = 137,559.78 × 56,658.49
  4. Step 4: Simplify right side
    99,672.54x = 7,793,929,419.53
  5. Step 5: Solve for x
    x = 7,793,929,419.53/99,672.54
  6. Step 6: Final answer
    x = 78,195.35

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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.