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Finding the Fourth Proportional to 156,680.17, 216,218.63 and 85,060.09

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Solution

The fourth proportional to 156,680.17, 216,218.63 and 85,060.09 is: 117,382.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,680.17 : 216,218.63 = 85,060.09 : x
  2. Step 2: Convert to fraction form
    156,680.17/216,218.63 = 85,060.09/x
  3. Step 3: Cross multiply
    156,680.17x = 216,218.63 × 85,060.09
  4. Step 4: Simplify right side
    156,680.17x = 18,391,575,259.03
  5. Step 5: Solve for x
    x = 18,391,575,259.03/156,680.17
  6. Step 6: Final answer
    x = 117,382.92

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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.