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Finding the Fourth Proportional to 92,502.20, 138,899.10 and 53,136.20

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Solution

The fourth proportional to 92,502.20, 138,899.10 and 53,136.20 is: 79,788.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,502.20 : 138,899.10 = 53,136.20 : x
  2. Step 2: Convert to fraction form
    92,502.20/138,899.10 = 53,136.20/x
  3. Step 3: Cross multiply
    92,502.20x = 138,899.10 × 53,136.20
  4. Step 4: Simplify right side
    92,502.20x = 7,380,570,357.42
  5. Step 5: Solve for x
    x = 7,380,570,357.42/92,502.20
  6. Step 6: Final answer
    x = 79,788.05

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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.