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Finding the Fourth Proportional to 113,879.20, 170,818.80 and 61,391.20

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Solution

The fourth proportional to 113,879.20, 170,818.80 and 61,391.20 is: 92,086.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,879.20 : 170,818.80 = 61,391.20 : x
  2. Step 2: Convert to fraction form
    113,879.20/170,818.80 = 61,391.20/x
  3. Step 3: Cross multiply
    113,879.20x = 170,818.80 × 61,391.20
  4. Step 4: Simplify right side
    113,879.20x = 10,486,771,114.56
  5. Step 5: Solve for x
    x = 10,486,771,114.56/113,879.20
  6. Step 6: Final answer
    x = 92,086.80

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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.