Home / 126,070.90-188,851.20-78,540.10

Finding the Fourth Proportional to 126,070.90, 188,851.20 and 78,540.10

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Solution

The fourth proportional to 126,070.90, 188,851.20 and 78,540.10 is: 117,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,070.90 : 188,851.20 = 78,540.10 : x
  2. Step 2: Convert to fraction form
    126,070.90/188,851.20 = 78,540.10/x
  3. Step 3: Cross multiply
    126,070.90x = 188,851.20 × 78,540.10
  4. Step 4: Simplify right side
    126,070.90x = 14,832,392,133.12
  5. Step 5: Solve for x
    x = 14,832,392,133.12/126,070.90
  6. Step 6: Final answer
    x = 117,651.20

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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.