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Finding the Fourth Proportional to 85,329.20, 127,830.60 and 45,873.20

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Solution

The fourth proportional to 85,329.20, 127,830.60 and 45,873.20 is: 68,722.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,329.20 : 127,830.60 = 45,873.20 : x
  2. Step 2: Convert to fraction form
    85,329.20/127,830.60 = 45,873.20/x
  3. Step 3: Cross multiply
    85,329.20x = 127,830.60 × 45,873.20
  4. Step 4: Simplify right side
    85,329.20x = 5,863,998,679.92
  5. Step 5: Solve for x
    x = 5,863,998,679.92/85,329.20
  6. Step 6: Final answer
    x = 68,722.06

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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.