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Finding the Fourth Proportional to 101,612.76, 140,134.23 and 65,765.40

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Solution

The fourth proportional to 101,612.76, 140,134.23 and 65,765.40 is: 90,697.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,612.76 : 140,134.23 = 65,765.40 : x
  2. Step 2: Convert to fraction form
    101,612.76/140,134.23 = 65,765.40/x
  3. Step 3: Cross multiply
    101,612.76x = 140,134.23 × 65,765.40
  4. Step 4: Simplify right side
    101,612.76x = 9,215,983,689.64
  5. Step 5: Solve for x
    x = 9,215,983,689.64/101,612.76
  6. Step 6: Final answer
    x = 90,697.11

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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.