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Finding the Fourth Proportional to 131,470.80, 197,206.20 and 109,309.20

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Solution

The fourth proportional to 131,470.80, 197,206.20 and 109,309.20 is: 163,963.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,470.80 : 197,206.20 = 109,309.20 : x
  2. Step 2: Convert to fraction form
    131,470.80/197,206.20 = 109,309.20/x
  3. Step 3: Cross multiply
    131,470.80x = 197,206.20 × 109,309.20
  4. Step 4: Simplify right side
    131,470.80x = 21,556,451,957.04
  5. Step 5: Solve for x
    x = 21,556,451,957.04/131,470.80
  6. Step 6: Final answer
    x = 163,963.80

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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.