Home / 83,937.20-126,051.60-81,312.80

Finding the Fourth Proportional to 83,937.20, 126,051.60 and 81,312.80

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Solution

The fourth proportional to 83,937.20, 126,051.60 and 81,312.80 is: 122,110.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,937.20 : 126,051.60 = 81,312.80 : x
  2. Step 2: Convert to fraction form
    83,937.20/126,051.60 = 81,312.80/x
  3. Step 3: Cross multiply
    83,937.20x = 126,051.60 × 81,312.80
  4. Step 4: Simplify right side
    83,937.20x = 10,249,608,540.48
  5. Step 5: Solve for x
    x = 10,249,608,540.48/83,937.20
  6. Step 6: Final answer
    x = 122,110.44

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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.