Home / 89,615.20-134,422.80-77,149.30

Finding the Fourth Proportional to 89,615.20, 134,422.80 and 77,149.30

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Solution

The fourth proportional to 89,615.20, 134,422.80 and 77,149.30 is: 115,723.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,615.20 : 134,422.80 = 77,149.30 : x
  2. Step 2: Convert to fraction form
    89,615.20/134,422.80 = 77,149.30/x
  3. Step 3: Cross multiply
    89,615.20x = 134,422.80 × 77,149.30
  4. Step 4: Simplify right side
    89,615.20x = 10,370,624,924.04
  5. Step 5: Solve for x
    x = 10,370,624,924.04/89,615.20
  6. Step 6: Final answer
    x = 115,723.95

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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.