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Finding the Fourth Proportional to 129,387.60, 194,015.80 and 59,206.78

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Solution

The fourth proportional to 129,387.60, 194,015.80 and 59,206.78 is: 88,780.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,387.60 : 194,015.80 = 59,206.78 : x
  2. Step 2: Convert to fraction form
    129,387.60/194,015.80 = 59,206.78/x
  3. Step 3: Cross multiply
    129,387.60x = 194,015.80 × 59,206.78
  4. Step 4: Simplify right side
    129,387.60x = 11,487,050,787.12
  5. Step 5: Solve for x
    x = 11,487,050,787.12/129,387.60
  6. Step 6: Final answer
    x = 88,780.15

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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.