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Finding the Fourth Proportional to 156,081, 215,323.14 and 91,517.28

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Solution

The fourth proportional to 156,081, 215,323.14 and 91,517.28 is: 126,253.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,081 : 215,323.14 = 91,517.28 : x
  2. Step 2: Convert to fraction form
    156,081/215,323.14 = 91,517.28/x
  3. Step 3: Cross multiply
    156,081x = 215,323.14 × 91,517.28
  4. Step 4: Simplify right side
    156,081x = 19,705,788,093.86
  5. Step 5: Solve for x
    x = 19,705,788,093.86/156,081
  6. Step 6: Final answer
    x = 126,253.60

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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.