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Finding the Fourth Proportional to 84,871.28, 127,307.28 and 28,711.82

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Solution

The fourth proportional to 84,871.28, 127,307.28 and 28,711.82 is: 43,067.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,871.28 : 127,307.28 = 28,711.82 : x
  2. Step 2: Convert to fraction form
    84,871.28/127,307.28 = 28,711.82/x
  3. Step 3: Cross multiply
    84,871.28x = 127,307.28 × 28,711.82
  4. Step 4: Simplify right side
    84,871.28x = 3,655,223,708.05
  5. Step 5: Solve for x
    x = 3,655,223,708.05/84,871.28
  6. Step 6: Final answer
    x = 43,067.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.