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Finding the Fourth Proportional to 207,309.48, 286,126.20 and 129,821.10

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Solution

The fourth proportional to 207,309.48, 286,126.20 and 129,821.10 is: 179,177.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,309.48 : 286,126.20 = 129,821.10 : x
  2. Step 2: Convert to fraction form
    207,309.48/286,126.20 = 129,821.10/x
  3. Step 3: Cross multiply
    207,309.48x = 286,126.20 × 129,821.10
  4. Step 4: Simplify right side
    207,309.48x = 37,145,218,022.82
  5. Step 5: Solve for x
    x = 37,145,218,022.82/207,309.48
  6. Step 6: Final answer
    x = 179,177.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.