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Finding the Fourth Proportional to 91,668.92, 137,290.14 and 89,146.44

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Solution

The fourth proportional to 91,668.92, 137,290.14 and 89,146.44 is: 133,512.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,668.92 : 137,290.14 = 89,146.44 : x
  2. Step 2: Convert to fraction form
    91,668.92/137,290.14 = 89,146.44/x
  3. Step 3: Cross multiply
    91,668.92x = 137,290.14 × 89,146.44
  4. Step 4: Simplify right side
    91,668.92x = 12,238,927,228.10
  5. Step 5: Solve for x
    x = 12,238,927,228.10/91,668.92
  6. Step 6: Final answer
    x = 133,512.30

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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.