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Finding the Fourth Proportional to 281,191.38, 421,787.07 and 123,421.20

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Solution

The fourth proportional to 281,191.38, 421,787.07 and 123,421.20 is: 185,131.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,191.38 : 421,787.07 = 123,421.20 : x
  2. Step 2: Convert to fraction form
    281,191.38/421,787.07 = 123,421.20/x
  3. Step 3: Cross multiply
    281,191.38x = 421,787.07 × 123,421.20
  4. Step 4: Simplify right side
    281,191.38x = 52,057,466,323.88
  5. Step 5: Solve for x
    x = 52,057,466,323.88/281,191.38
  6. Step 6: Final answer
    x = 185,131.80

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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.