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Finding the Fourth Proportional to 156,663.71, 216,195.31 and 85,043.10

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Solution

The fourth proportional to 156,663.71, 216,195.31 and 85,043.10 is: 117,359.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,663.71 : 216,195.31 = 85,043.10 : x
  2. Step 2: Convert to fraction form
    156,663.71/216,195.31 = 85,043.10/x
  3. Step 3: Cross multiply
    156,663.71x = 216,195.31 × 85,043.10
  4. Step 4: Simplify right side
    156,663.71x = 18,385,920,284.90
  5. Step 5: Solve for x
    x = 18,385,920,284.90/156,663.71
  6. Step 6: Final answer
    x = 117,359.15

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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.