Home / 204,787.20-282,780.90-128,434.80

Finding the Fourth Proportional to 204,787.20, 282,780.90 and 128,434.80

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Solution

The fourth proportional to 204,787.20, 282,780.90 and 128,434.80 is: 177,349.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,787.20 : 282,780.90 = 128,434.80 : x
  2. Step 2: Convert to fraction form
    204,787.20/282,780.90 = 128,434.80/x
  3. Step 3: Cross multiply
    204,787.20x = 282,780.90 × 128,434.80
  4. Step 4: Simplify right side
    204,787.20x = 36,318,908,335.32
  5. Step 5: Solve for x
    x = 36,318,908,335.32/204,787.20
  6. Step 6: Final answer
    x = 177,349.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.