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Finding the Fourth Proportional to 91,711.82, 137,390.61 and 67,653.74

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Solution

The fourth proportional to 91,711.82, 137,390.61 and 67,653.74 is: 101,349.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,711.82 : 137,390.61 = 67,653.74 : x
  2. Step 2: Convert to fraction form
    91,711.82/137,390.61 = 67,653.74/x
  3. Step 3: Cross multiply
    91,711.82x = 137,390.61 × 67,653.74
  4. Step 4: Simplify right side
    91,711.82x = 9,294,988,607.38
  5. Step 5: Solve for x
    x = 9,294,988,607.38/91,711.82
  6. Step 6: Final answer
    x = 101,349.95

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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.