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Finding the Fourth Proportional to 79,729.92, 119,629.44 and 42,750.72

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Solution

The fourth proportional to 79,729.92, 119,629.44 and 42,750.72 is: 64,144.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,729.92 : 119,629.44 = 42,750.72 : x
  2. Step 2: Convert to fraction form
    79,729.92/119,629.44 = 42,750.72/x
  3. Step 3: Cross multiply
    79,729.92x = 119,629.44 × 42,750.72
  4. Step 4: Simplify right side
    79,729.92x = 5,114,244,693.20
  5. Step 5: Solve for x
    x = 5,114,244,693.20/79,729.92
  6. Step 6: Final answer
    x = 64,144.61

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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.