Home / 78,839.40-118,198.86-39,424.20

Finding the Fourth Proportional to 78,839.40, 118,198.86 and 39,424.20

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Solution

The fourth proportional to 78,839.40, 118,198.86 and 39,424.20 is: 59,106.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,839.40 : 118,198.86 = 39,424.20 : x
  2. Step 2: Convert to fraction form
    78,839.40/118,198.86 = 39,424.20/x
  3. Step 3: Cross multiply
    78,839.40x = 118,198.86 × 39,424.20
  4. Step 4: Simplify right side
    78,839.40x = 4,659,895,496.41
  5. Step 5: Solve for x
    x = 4,659,895,496.41/78,839.40
  6. Step 6: Final answer
    x = 59,106.18

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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.