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Finding the Fourth Proportional to 126,007.80, 188,720.10 and 86,350.20

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Solution

The fourth proportional to 126,007.80, 188,720.10 and 86,350.20 is: 129,325.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,007.80 : 188,720.10 = 86,350.20 : x
  2. Step 2: Convert to fraction form
    126,007.80/188,720.10 = 86,350.20/x
  3. Step 3: Cross multiply
    126,007.80x = 188,720.10 × 86,350.20
  4. Step 4: Simplify right side
    126,007.80x = 16,296,018,379.02
  5. Step 5: Solve for x
    x = 16,296,018,379.02/126,007.80
  6. Step 6: Final answer
    x = 129,325.47

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1.5x scale

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.