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Finding the Fourth Proportional to 178,812.40, 267,781.20 and 85,208.80

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Solution

The fourth proportional to 178,812.40, 267,781.20 and 85,208.80 is: 127,604.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,812.40 : 267,781.20 = 85,208.80 : x
  2. Step 2: Convert to fraction form
    178,812.40/267,781.20 = 85,208.80/x
  3. Step 3: Cross multiply
    178,812.40x = 267,781.20 × 85,208.80
  4. Step 4: Simplify right side
    178,812.40x = 22,817,314,714.56
  5. Step 5: Solve for x
    x = 22,817,314,714.56/178,812.40
  6. Step 6: Final answer
    x = 127,604.77

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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.