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Finding the Fourth Proportional to 156,893.78, 216,515.10 and 85,273.80

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Solution

The fourth proportional to 156,893.78, 216,515.10 and 85,273.80 is: 117,678.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,893.78 : 216,515.10 = 85,273.80 : x
  2. Step 2: Convert to fraction form
    156,893.78/216,515.10 = 85,273.80/x
  3. Step 3: Cross multiply
    156,893.78x = 216,515.10 × 85,273.80
  4. Step 4: Simplify right side
    156,893.78x = 18,463,065,334.38
  5. Step 5: Solve for x
    x = 18,463,065,334.38/156,893.78
  6. Step 6: Final answer
    x = 117,678.76

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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.