Home / 71,016.40-98,002.72-39,187.20

Finding the Fourth Proportional to 71,016.40, 98,002.72 and 39,187.20

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Solution

The fourth proportional to 71,016.40, 98,002.72 and 39,187.20 is: 54,078.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,016.40 : 98,002.72 = 39,187.20 : x
  2. Step 2: Convert to fraction form
    71,016.40/98,002.72 = 39,187.20/x
  3. Step 3: Cross multiply
    71,016.40x = 98,002.72 × 39,187.20
  4. Step 4: Simplify right side
    71,016.40x = 3,840,452,189.18
  5. Step 5: Solve for x
    x = 3,840,452,189.18/71,016.40
  6. Step 6: Final answer
    x = 54,078.38

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Half scale
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Double scale
Find fourth proportional to 71,017.40, 98,004.10 and 39,188.20
Similar ratio
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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.