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Finding the Fourth Proportional to 82,436.40, 124,272.40 and 76,943.52

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Solution

The fourth proportional to 82,436.40, 124,272.40 and 76,943.52 is: 115,991.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,436.40 : 124,272.40 = 76,943.52 : x
  2. Step 2: Convert to fraction form
    82,436.40/124,272.40 = 76,943.52/x
  3. Step 3: Cross multiply
    82,436.40x = 124,272.40 × 76,943.52
  4. Step 4: Simplify right side
    82,436.40x = 9,561,955,894.85
  5. Step 5: Solve for x
    x = 9,561,955,894.85/82,436.40
  6. Step 6: Final answer
    x = 115,991.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.