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Finding the Fourth Proportional to 205,011.80, 307,560.90 and 86,622.20

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Solution

The fourth proportional to 205,011.80, 307,560.90 and 86,622.20 is: 129,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,011.80 : 307,560.90 = 86,622.20 : x
  2. Step 2: Convert to fraction form
    205,011.80/307,560.90 = 86,622.20/x
  3. Step 3: Cross multiply
    205,011.80x = 307,560.90 × 86,622.20
  4. Step 4: Simplify right side
    205,011.80x = 26,641,601,791.98
  5. Step 5: Solve for x
    x = 26,641,601,791.98/205,011.80
  6. Step 6: Final answer
    x = 129,951.55

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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.