Home / 78,589.06-108,452.80-42,778.96

Finding the Fourth Proportional to 78,589.06, 108,452.80 and 42,778.96

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Solution

The fourth proportional to 78,589.06, 108,452.80 and 42,778.96 is: 59,034.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,589.06 : 108,452.80 = 42,778.96 : x
  2. Step 2: Convert to fraction form
    78,589.06/108,452.80 = 42,778.96/x
  3. Step 3: Cross multiply
    78,589.06x = 108,452.80 × 42,778.96
  4. Step 4: Simplify right side
    78,589.06x = 4,639,497,993.09
  5. Step 5: Solve for x
    x = 4,639,497,993.09/78,589.06
  6. Step 6: Final answer
    x = 59,034.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.