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Finding the Fourth Proportional to 138,574.68, 207,101.93 and 101,213.43

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Solution

The fourth proportional to 138,574.68, 207,101.93 and 101,213.43 is: 151,264.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,574.68 : 207,101.93 = 101,213.43 : x
  2. Step 2: Convert to fraction form
    138,574.68/207,101.93 = 101,213.43/x
  3. Step 3: Cross multiply
    138,574.68x = 207,101.93 × 101,213.43
  4. Step 4: Simplify right side
    138,574.68x = 20,961,496,188.85
  5. Step 5: Solve for x
    x = 20,961,496,188.85/138,574.68
  6. Step 6: Final answer
    x = 151,264.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.