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Finding the Fourth Proportional to 178,814.40, 267,784.20 and 85,210.80

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Solution

The fourth proportional to 178,814.40, 267,784.20 and 85,210.80 is: 127,607.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,814.40 : 267,784.20 = 85,210.80 : x
  2. Step 2: Convert to fraction form
    178,814.40/267,784.20 = 85,210.80/x
  3. Step 3: Cross multiply
    178,814.40x = 267,784.20 × 85,210.80
  4. Step 4: Simplify right side
    178,814.40x = 22,818,105,909.36
  5. Step 5: Solve for x
    x = 22,818,105,909.36/178,814.40
  6. Step 6: Final answer
    x = 127,607.76

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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.