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Finding the Fourth Proportional to 138,289.98, 207,449.73 and 38,450.46

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Solution

The fourth proportional to 138,289.98, 207,449.73 and 38,450.46 is: 57,679.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,289.98 : 207,449.73 = 38,450.46 : x
  2. Step 2: Convert to fraction form
    138,289.98/207,449.73 = 38,450.46/x
  3. Step 3: Cross multiply
    138,289.98x = 207,449.73 × 38,450.46
  4. Step 4: Simplify right side
    138,289.98x = 7,976,537,545.38
  5. Step 5: Solve for x
    x = 7,976,537,545.38/138,289.98
  6. Step 6: Final answer
    x = 57,679.79

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1.5x scale

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.