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Finding the Fourth Proportional to 91,897.76, 137,854.20 and 39,307.76

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Solution

The fourth proportional to 91,897.76, 137,854.20 and 39,307.76 is: 58,964.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,897.76 : 137,854.20 = 39,307.76 : x
  2. Step 2: Convert to fraction form
    91,897.76/137,854.20 = 39,307.76/x
  3. Step 3: Cross multiply
    91,897.76x = 137,854.20 × 39,307.76
  4. Step 4: Simplify right side
    91,897.76x = 5,418,739,808.59
  5. Step 5: Solve for x
    x = 5,418,739,808.59/91,897.76
  6. Step 6: Final answer
    x = 58,964.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.