Home / 98,839.28-136,420.64-77,286.39

Finding the Fourth Proportional to 98,839.28, 136,420.64 and 77,286.39

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Solution

The fourth proportional to 98,839.28, 136,420.64 and 77,286.39 is: 106,672.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,839.28 : 136,420.64 = 77,286.39 : x
  2. Step 2: Convert to fraction form
    98,839.28/136,420.64 = 77,286.39/x
  3. Step 3: Cross multiply
    98,839.28x = 136,420.64 × 77,286.39
  4. Step 4: Simplify right side
    98,839.28x = 10,543,458,400.66
  5. Step 5: Solve for x
    x = 10,543,458,400.66/98,839.28
  6. Step 6: Final answer
    x = 106,672.76

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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.