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Finding the Fourth Proportional to 204,482.80, 306,724.20 and 129,687.40

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Solution

The fourth proportional to 204,482.80, 306,724.20 and 129,687.40 is: 194,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,482.80 : 306,724.20 = 129,687.40 : x
  2. Step 2: Convert to fraction form
    204,482.80/306,724.20 = 129,687.40/x
  3. Step 3: Cross multiply
    204,482.80x = 306,724.20 × 129,687.40
  4. Step 4: Simplify right side
    204,482.80x = 39,778,264,015.08
  5. Step 5: Solve for x
    x = 39,778,264,015.08/204,482.80
  6. Step 6: Final answer
    x = 194,531.10

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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.