Home / 138,501.82-191,132.57-74,839.62

Finding the Fourth Proportional to 138,501.82, 191,132.57 and 74,839.62

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Solution

The fourth proportional to 138,501.82, 191,132.57 and 74,839.62 is: 103,278.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,501.82 : 191,132.57 = 74,839.62 : x
  2. Step 2: Convert to fraction form
    138,501.82/191,132.57 = 74,839.62/x
  3. Step 3: Cross multiply
    138,501.82x = 191,132.57 × 74,839.62
  4. Step 4: Simplify right side
    138,501.82x = 14,304,288,908.42
  5. Step 5: Solve for x
    x = 14,304,288,908.42/138,501.82
  6. Step 6: Final answer
    x = 103,278.71

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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.