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Finding the Fourth Proportional to 156,636.61, 216,156.09 and 85,016.02

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Solution

The fourth proportional to 156,636.61, 216,156.09 and 85,016.02 is: 117,320.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,636.61 : 216,156.09 = 85,016.02 : x
  2. Step 2: Convert to fraction form
    156,636.61/216,156.09 = 85,016.02/x
  3. Step 3: Cross multiply
    156,636.61x = 216,156.09 × 85,016.02
  4. Step 4: Simplify right side
    156,636.61x = 18,376,730,470.56
  5. Step 5: Solve for x
    x = 18,376,730,470.56/156,636.61
  6. Step 6: Final answer
    x = 117,320.79

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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.