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Finding the Fourth Proportional to 113,879.20, 170,818.80 and 78,887.20

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Solution

The fourth proportional to 113,879.20, 170,818.80 and 78,887.20 is: 118,330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,879.20 : 170,818.80 = 78,887.20 : x
  2. Step 2: Convert to fraction form
    113,879.20/170,818.80 = 78,887.20/x
  3. Step 3: Cross multiply
    113,879.20x = 170,818.80 × 78,887.20
  4. Step 4: Simplify right side
    113,879.20x = 13,475,416,839.36
  5. Step 5: Solve for x
    x = 13,475,416,839.36/113,879.20
  6. Step 6: Final answer
    x = 118,330.80

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1.5x scale

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.