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Finding the Fourth Proportional to 61,191.90, 91,776.78 and 38,939.13

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Solution

The fourth proportional to 61,191.90, 91,776.78 and 38,939.13 is: 58,401.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,191.90 : 91,776.78 = 38,939.13 : x
  2. Step 2: Convert to fraction form
    61,191.90/91,776.78 = 38,939.13/x
  3. Step 3: Cross multiply
    61,191.90x = 91,776.78 × 38,939.13
  4. Step 4: Simplify right side
    61,191.90x = 3,573,707,967.40
  5. Step 5: Solve for x
    x = 3,573,707,967.40/61,191.90
  6. Step 6: Final answer
    x = 58,401.65

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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.