Home / 88,538.40-132,807.60-81,321.30

Finding the Fourth Proportional to 88,538.40, 132,807.60 and 81,321.30

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Solution

The fourth proportional to 88,538.40, 132,807.60 and 81,321.30 is: 121,981.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,538.40 : 132,807.60 = 81,321.30 : x
  2. Step 2: Convert to fraction form
    88,538.40/132,807.60 = 81,321.30/x
  3. Step 3: Cross multiply
    88,538.40x = 132,807.60 × 81,321.30
  4. Step 4: Simplify right side
    88,538.40x = 10,800,086,681.88
  5. Step 5: Solve for x
    x = 10,800,086,681.88/88,538.40
  6. Step 6: Final answer
    x = 121,981.95

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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.