Home / 138,931.74-191,757.25-78,537.43

Finding the Fourth Proportional to 138,931.74, 191,757.25 and 78,537.43

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Solution

The fourth proportional to 138,931.74, 191,757.25 and 78,537.43 is: 108,399.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,931.74 : 191,757.25 = 78,537.43 : x
  2. Step 2: Convert to fraction form
    138,931.74/191,757.25 = 78,537.43/x
  3. Step 3: Cross multiply
    138,931.74x = 191,757.25 × 78,537.43
  4. Step 4: Simplify right side
    138,931.74x = 15,060,121,598.87
  5. Step 5: Solve for x
    x = 15,060,121,598.87/138,931.74
  6. Step 6: Final answer
    x = 108,399.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.