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Finding the Fourth Proportional to 137,968.80, 206,953.20 and 127,471.20

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Solution

The fourth proportional to 137,968.80, 206,953.20 and 127,471.20 is: 191,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,968.80 : 206,953.20 = 127,471.20 : x
  2. Step 2: Convert to fraction form
    137,968.80/206,953.20 = 127,471.20/x
  3. Step 3: Cross multiply
    137,968.80x = 206,953.20 × 127,471.20
  4. Step 4: Simplify right side
    137,968.80x = 26,380,572,747.84
  5. Step 5: Solve for x
    x = 26,380,572,747.84/137,968.80
  6. Step 6: Final answer
    x = 191,206.80

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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.