Home / 86,620.20-129,930.30-49,165.80

Finding the Fourth Proportional to 86,620.20, 129,930.30 and 49,165.80

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Solution

The fourth proportional to 86,620.20, 129,930.30 and 49,165.80 is: 73,748.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,620.20 : 129,930.30 = 49,165.80 : x
  2. Step 2: Convert to fraction form
    86,620.20/129,930.30 = 49,165.80/x
  3. Step 3: Cross multiply
    86,620.20x = 129,930.30 × 49,165.80
  4. Step 4: Simplify right side
    86,620.20x = 6,388,127,143.74
  5. Step 5: Solve for x
    x = 6,388,127,143.74/86,620.20
  6. Step 6: Final answer
    x = 73,748.70

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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.