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Finding the Fourth Proportional to 252,113.20, 378,144.20 and 85,898.80

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Solution

The fourth proportional to 252,113.20, 378,144.20 and 85,898.80 is: 128,839.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,113.20 : 378,144.20 = 85,898.80 : x
  2. Step 2: Convert to fraction form
    252,113.20/378,144.20 = 85,898.80/x
  3. Step 3: Cross multiply
    252,113.20x = 378,144.20 × 85,898.80
  4. Step 4: Simplify right side
    252,113.20x = 32,482,133,006.96
  5. Step 5: Solve for x
    x = 32,482,133,006.96/252,113.20
  6. Step 6: Final answer
    x = 128,839.48

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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.