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Finding the Fourth Proportional to 88,704.80, 132,862.80 and 77,040.80

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Solution

The fourth proportional to 88,704.80, 132,862.80 and 77,040.80 is: 115,392.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,704.80 : 132,862.80 = 77,040.80 : x
  2. Step 2: Convert to fraction form
    88,704.80/132,862.80 = 77,040.80/x
  3. Step 3: Cross multiply
    88,704.80x = 132,862.80 × 77,040.80
  4. Step 4: Simplify right side
    88,704.80x = 10,235,856,402.24
  5. Step 5: Solve for x
    x = 10,235,856,402.24/88,704.80
  6. Step 6: Final answer
    x = 115,392.36

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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.