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Finding the Fourth Proportional to 156,841.88, 216,442.80 and 85,221.88

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Solution

The fourth proportional to 156,841.88, 216,442.80 and 85,221.88 is: 117,606.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,841.88 : 216,442.80 = 85,221.88 : x
  2. Step 2: Convert to fraction form
    156,841.88/216,442.80 = 85,221.88/x
  3. Step 3: Cross multiply
    156,841.88x = 216,442.80 × 85,221.88
  4. Step 4: Simplify right side
    156,841.88x = 18,445,661,787.36
  5. Step 5: Solve for x
    x = 18,445,661,787.36/156,841.88
  6. Step 6: Final answer
    x = 117,606.74

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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.