Home / 78,589.46-108,455.88-42,781.85

Finding the Fourth Proportional to 78,589.46, 108,455.88 and 42,781.85

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Solution

The fourth proportional to 78,589.46, 108,455.88 and 42,781.85 is: 59,040.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,589.46 : 108,455.88 = 42,781.85 : x
  2. Step 2: Convert to fraction form
    78,589.46/108,455.88 = 42,781.85/x
  3. Step 3: Cross multiply
    78,589.46x = 108,455.88 × 42,781.85
  4. Step 4: Simplify right side
    78,589.46x = 4,639,942,647.50
  5. Step 5: Solve for x
    x = 4,639,942,647.50/78,589.46
  6. Step 6: Final answer
    x = 59,040.27

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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.