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Finding the Fourth Proportional to 91,808.30, 137,712.45 and 49,672.10

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Solution

The fourth proportional to 91,808.30, 137,712.45 and 49,672.10 is: 74,508.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,808.30 : 137,712.45 = 49,672.10 : x
  2. Step 2: Convert to fraction form
    91,808.30/137,712.45 = 49,672.10/x
  3. Step 3: Cross multiply
    91,808.30x = 137,712.45 × 49,672.10
  4. Step 4: Simplify right side
    91,808.30x = 6,840,466,587.65
  5. Step 5: Solve for x
    x = 6,840,466,587.65/91,808.30
  6. Step 6: Final answer
    x = 74,508.15

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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.