Home / 78,839.24-118,274.43-28,919.80

Finding the Fourth Proportional to 78,839.24, 118,274.43 and 28,919.80

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Solution

The fourth proportional to 78,839.24, 118,274.43 and 28,919.80 is: 43,385.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,839.24 : 118,274.43 = 28,919.80 : x
  2. Step 2: Convert to fraction form
    78,839.24/118,274.43 = 28,919.80/x
  3. Step 3: Cross multiply
    78,839.24x = 118,274.43 × 28,919.80
  4. Step 4: Simplify right side
    78,839.24x = 3,420,472,860.71
  5. Step 5: Solve for x
    x = 3,420,472,860.71/78,839.24
  6. Step 6: Final answer
    x = 43,385.41

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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.