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Finding the Fourth Proportional to 138,758.87, 207,970.69 and 67,574.84

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Solution

The fourth proportional to 138,758.87, 207,970.69 and 67,574.84 is: 101,280.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,758.87 : 207,970.69 = 67,574.84 : x
  2. Step 2: Convert to fraction form
    138,758.87/207,970.69 = 67,574.84/x
  3. Step 3: Cross multiply
    138,758.87x = 207,970.69 × 67,574.84
  4. Step 4: Simplify right side
    138,758.87x = 14,053,586,346.78
  5. Step 5: Solve for x
    x = 14,053,586,346.78/138,758.87
  6. Step 6: Final answer
    x = 101,280.63

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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.