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Finding the Fourth Proportional to 113,539.86, 156,685.05 and 65,820.87

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Solution

The fourth proportional to 113,539.86, 156,685.05 and 65,820.87 is: 90,832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,539.86 : 156,685.05 = 65,820.87 : x
  2. Step 2: Convert to fraction form
    113,539.86/156,685.05 = 65,820.87/x
  3. Step 3: Cross multiply
    113,539.86x = 156,685.05 × 65,820.87
  4. Step 4: Simplify right side
    113,539.86x = 10,313,146,306.99
  5. Step 5: Solve for x
    x = 10,313,146,306.99/113,539.86
  6. Step 6: Final answer
    x = 90,832.83

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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.