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Finding the Fourth Proportional to 65,742.60, 98,613.90 and 19,000.20

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Solution

The fourth proportional to 65,742.60, 98,613.90 and 19,000.20 is: 28,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,742.60 : 98,613.90 = 19,000.20 : x
  2. Step 2: Convert to fraction form
    65,742.60/98,613.90 = 19,000.20/x
  3. Step 3: Cross multiply
    65,742.60x = 98,613.90 × 19,000.20
  4. Step 4: Simplify right side
    65,742.60x = 1,873,683,822.78
  5. Step 5: Solve for x
    x = 1,873,683,822.78/65,742.60
  6. Step 6: Final answer
    x = 28,500.30

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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.