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Finding the Fourth Proportional to 101,581, 140,149.36 and 65,798.44

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Solution

The fourth proportional to 101,581, 140,149.36 and 65,798.44 is: 90,780.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,581 : 140,149.36 = 65,798.44 : x
  2. Step 2: Convert to fraction form
    101,581/140,149.36 = 65,798.44/x
  3. Step 3: Cross multiply
    101,581x = 140,149.36 × 65,798.44
  4. Step 4: Simplify right side
    101,581x = 9,221,609,255.00
  5. Step 5: Solve for x
    x = 9,221,609,255.00/101,581
  6. Step 6: Final answer
    x = 90,780.85

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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.