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Finding the Fourth Proportional to 101,928.20, 140,656.20 and 56,609.08

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Solution

The fourth proportional to 101,928.20, 140,656.20 and 56,609.08 is: 78,117.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,928.20 : 140,656.20 = 56,609.08 : x
  2. Step 2: Convert to fraction form
    101,928.20/140,656.20 = 56,609.08/x
  3. Step 3: Cross multiply
    101,928.20x = 140,656.20 × 56,609.08
  4. Step 4: Simplify right side
    101,928.20x = 7,962,418,078.30
  5. Step 5: Solve for x
    x = 7,962,418,078.30/101,928.20
  6. Step 6: Final answer
    x = 78,117.91

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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.