Home / 77,839.91-107,381.78-74,822.15

Finding the Fourth Proportional to 77,839.91, 107,381.78 and 74,822.15

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Solution

The fourth proportional to 77,839.91, 107,381.78 and 74,822.15 is: 103,218.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,839.91 : 107,381.78 = 74,822.15 : x
  2. Step 2: Convert to fraction form
    77,839.91/107,381.78 = 74,822.15/x
  3. Step 3: Cross multiply
    77,839.91x = 107,381.78 × 74,822.15
  4. Step 4: Simplify right side
    77,839.91x = 8,034,535,300.57
  5. Step 5: Solve for x
    x = 8,034,535,300.57/77,839.91
  6. Step 6: Final answer
    x = 103,218.72

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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.