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Finding the Fourth Proportional to 89,737.20, 134,605.80 and 77,271.30

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Solution

The fourth proportional to 89,737.20, 134,605.80 and 77,271.30 is: 115,906.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,737.20 : 134,605.80 = 77,271.30 : x
  2. Step 2: Convert to fraction form
    89,737.20/134,605.80 = 77,271.30/x
  3. Step 3: Cross multiply
    89,737.20x = 134,605.80 × 77,271.30
  4. Step 4: Simplify right side
    89,737.20x = 10,401,165,153.54
  5. Step 5: Solve for x
    x = 10,401,165,153.54/89,737.20
  6. Step 6: Final answer
    x = 115,906.95

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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.