Home / 85,853.55-128,780.33-39,197.55

Finding the Fourth Proportional to 85,853.55, 128,780.33 and 39,197.55

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Solution

The fourth proportional to 85,853.55, 128,780.33 and 39,197.55 is: 58,796.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,853.55 : 128,780.33 = 39,197.55 : x
  2. Step 2: Convert to fraction form
    85,853.55/128,780.33 = 39,197.55/x
  3. Step 3: Cross multiply
    85,853.55x = 128,780.33 × 39,197.55
  4. Step 4: Simplify right side
    85,853.55x = 5,047,873,228.20
  5. Step 5: Solve for x
    x = 5,047,873,228.20/85,853.55
  6. Step 6: Final answer
    x = 58,796.33

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.