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Finding the Fourth Proportional to 101,986.98, 140,762.28 and 65,169.66

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Solution

The fourth proportional to 101,986.98, 140,762.28 and 65,169.66 is: 89,947.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,986.98 : 140,762.28 = 65,169.66 : x
  2. Step 2: Convert to fraction form
    101,986.98/140,762.28 = 65,169.66/x
  3. Step 3: Cross multiply
    101,986.98x = 140,762.28 × 65,169.66
  4. Step 4: Simplify right side
    101,986.98x = 9,173,429,928.42
  5. Step 5: Solve for x
    x = 9,173,429,928.42/101,986.98
  6. Step 6: Final answer
    x = 89,947.07

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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.