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Finding the Fourth Proportional to 156,591.88, 216,006.42 and 99,939.40

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Solution

The fourth proportional to 156,591.88, 216,006.42 and 99,939.40 is: 137,858.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,591.88 : 216,006.42 = 99,939.40 : x
  2. Step 2: Convert to fraction form
    156,591.88/216,006.42 = 99,939.40/x
  3. Step 3: Cross multiply
    156,591.88x = 216,006.42 × 99,939.40
  4. Step 4: Simplify right side
    156,591.88x = 21,587,552,010.95
  5. Step 5: Solve for x
    x = 21,587,552,010.95/156,591.88
  6. Step 6: Final answer
    x = 137,858.69

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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.