Home / 86,519.20-129,855.60-74,077.60

Finding the Fourth Proportional to 86,519.20, 129,855.60 and 74,077.60

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Solution

The fourth proportional to 86,519.20, 129,855.60 and 74,077.60 is: 111,182.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,519.20 : 129,855.60 = 74,077.60 : x
  2. Step 2: Convert to fraction form
    86,519.20/129,855.60 = 74,077.60/x
  3. Step 3: Cross multiply
    86,519.20x = 129,855.60 × 74,077.60
  4. Step 4: Simplify right side
    86,519.20x = 9,619,391,194.56
  5. Step 5: Solve for x
    x = 9,619,391,194.56/86,519.20
  6. Step 6: Final answer
    x = 111,182.16

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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.