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Finding the Fourth Proportional to 88,391.95, 132,412.96 and 77,311.15

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Solution

The fourth proportional to 88,391.95, 132,412.96 and 77,311.15 is: 115,813.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,391.95 : 132,412.96 = 77,311.15 : x
  2. Step 2: Convert to fraction form
    88,391.95/132,412.96 = 77,311.15/x
  3. Step 3: Cross multiply
    88,391.95x = 132,412.96 × 77,311.15
  4. Step 4: Simplify right side
    88,391.95x = 10,236,997,163.88
  5. Step 5: Solve for x
    x = 10,236,997,163.88/88,391.95
  6. Step 6: Final answer
    x = 115,813.69

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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.