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Finding the Fourth Proportional to 111,305.60, 153,595.20 and 65,987.92

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Solution

The fourth proportional to 111,305.60, 153,595.20 and 65,987.92 is: 91,059.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,305.60 : 153,595.20 = 65,987.92 : x
  2. Step 2: Convert to fraction form
    111,305.60/153,595.20 = 65,987.92/x
  3. Step 3: Cross multiply
    111,305.60x = 153,595.20 × 65,987.92
  4. Step 4: Simplify right side
    111,305.60x = 10,135,427,769.98
  5. Step 5: Solve for x
    x = 10,135,427,769.98/111,305.60
  6. Step 6: Final answer
    x = 91,059.46

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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.