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Finding the Fourth Proportional to 138,422.90, 207,623.55 and 54,166.70

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Solution

The fourth proportional to 138,422.90, 207,623.55 and 54,166.70 is: 81,245.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,422.90 : 207,623.55 = 54,166.70 : x
  2. Step 2: Convert to fraction form
    138,422.90/207,623.55 = 54,166.70/x
  3. Step 3: Cross multiply
    138,422.90x = 207,623.55 × 54,166.70
  4. Step 4: Simplify right side
    138,422.90x = 11,246,282,545.79
  5. Step 5: Solve for x
    x = 11,246,282,545.79/138,422.90
  6. Step 6: Final answer
    x = 81,245.82

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