Home / 138,129.15-207,173.22-38,278.93

Finding the Fourth Proportional to 138,129.15, 207,173.22 and 38,278.93

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Solution

The fourth proportional to 138,129.15, 207,173.22 and 38,278.93 is: 57,412.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,129.15 : 207,173.22 = 38,278.93 : x
  2. Step 2: Convert to fraction form
    138,129.15/207,173.22 = 38,278.93/x
  3. Step 3: Cross multiply
    138,129.15x = 207,173.22 × 38,278.93
  4. Step 4: Simplify right side
    138,129.15x = 7,930,369,186.25
  5. Step 5: Solve for x
    x = 7,930,369,186.25/138,129.15
  6. Step 6: Final answer
    x = 57,412.71

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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.