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Finding the Fourth Proportional to 205,081.80, 307,622.70 and 125,939.40

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Solution

The fourth proportional to 205,081.80, 307,622.70 and 125,939.40 is: 188,909.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,081.80 : 307,622.70 = 125,939.40 : x
  2. Step 2: Convert to fraction form
    205,081.80/307,622.70 = 125,939.40/x
  3. Step 3: Cross multiply
    205,081.80x = 307,622.70 × 125,939.40
  4. Step 4: Simplify right side
    205,081.80x = 38,741,818,264.38
  5. Step 5: Solve for x
    x = 38,741,818,264.38/205,081.80
  6. Step 6: Final answer
    x = 188,909.10

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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.