Home / 78,570.20-108,425.82-42,759.80

Finding the Fourth Proportional to 78,570.20, 108,425.82 and 42,759.80

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Solution

The fourth proportional to 78,570.20, 108,425.82 and 42,759.80 is: 59,007.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,570.20 : 108,425.82 = 42,759.80 : x
  2. Step 2: Convert to fraction form
    78,570.20/108,425.82 = 42,759.80/x
  3. Step 3: Cross multiply
    78,570.20x = 108,425.82 × 42,759.80
  4. Step 4: Simplify right side
    78,570.20x = 4,636,266,378.04
  5. Step 5: Solve for x
    x = 4,636,266,378.04/78,570.20
  6. Step 6: Final answer
    x = 59,007.95

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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.