Home / 40,879.20-61,318.80-39,129.60

Finding the Fourth Proportional to 40,879.20, 61,318.80 and 39,129.60

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Solution

The fourth proportional to 40,879.20, 61,318.80 and 39,129.60 is: 58,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,879.20 : 61,318.80 = 39,129.60 : x
  2. Step 2: Convert to fraction form
    40,879.20/61,318.80 = 39,129.60/x
  3. Step 3: Cross multiply
    40,879.20x = 61,318.80 × 39,129.60
  4. Step 4: Simplify right side
    40,879.20x = 2,399,380,116.48
  5. Step 5: Solve for x
    x = 2,399,380,116.48/40,879.20
  6. Step 6: Final answer
    x = 58,694.40

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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.