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Finding the Fourth Proportional to 156,871.57, 216,484.14 and 85,251.59

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Solution

The fourth proportional to 156,871.57, 216,484.14 and 85,251.59 is: 117,647.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,871.57 : 216,484.14 = 85,251.59 : x
  2. Step 2: Convert to fraction form
    156,871.57/216,484.14 = 85,251.59/x
  3. Step 3: Cross multiply
    156,871.57x = 216,484.14 × 85,251.59
  4. Step 4: Simplify right side
    156,871.57x = 18,455,617,144.78
  5. Step 5: Solve for x
    x = 18,455,617,144.78/156,871.57
  6. Step 6: Final answer
    x = 117,647.94

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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.