Home / 89,587.20-134,380.80-77,121.30

Finding the Fourth Proportional to 89,587.20, 134,380.80 and 77,121.30

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Solution

The fourth proportional to 89,587.20, 134,380.80 and 77,121.30 is: 115,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,587.20 : 134,380.80 = 77,121.30 : x
  2. Step 2: Convert to fraction form
    89,587.20/134,380.80 = 77,121.30/x
  3. Step 3: Cross multiply
    89,587.20x = 134,380.80 × 77,121.30
  4. Step 4: Simplify right side
    89,587.20x = 10,363,621,991.04
  5. Step 5: Solve for x
    x = 10,363,621,991.04/89,587.20
  6. Step 6: Final answer
    x = 115,681.95

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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.