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Finding the Fourth Proportional to 156,822.80, 216,411.72 and 85,201.20

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Solution

The fourth proportional to 156,822.80, 216,411.72 and 85,201.20 is: 117,575.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,822.80 : 216,411.72 = 85,201.20 : x
  2. Step 2: Convert to fraction form
    156,822.80/216,411.72 = 85,201.20/x
  3. Step 3: Cross multiply
    156,822.80x = 216,411.72 × 85,201.20
  4. Step 4: Simplify right side
    156,822.80x = 18,438,538,238.06
  5. Step 5: Solve for x
    x = 18,438,538,238.06/156,822.80
  6. Step 6: Final answer
    x = 117,575.62

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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.