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Finding the Fourth Proportional to 85,387.85, 117,837.11 and 47,147.30

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Solution

The fourth proportional to 85,387.85, 117,837.11 and 47,147.30 is: 65,064.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,387.85 : 117,837.11 = 47,147.30 : x
  2. Step 2: Convert to fraction form
    85,387.85/117,837.11 = 47,147.30/x
  3. Step 3: Cross multiply
    85,387.85x = 117,837.11 × 47,147.30
  4. Step 4: Simplify right side
    85,387.85x = 5,555,701,016.56
  5. Step 5: Solve for x
    x = 5,555,701,016.56/85,387.85
  6. Step 6: Final answer
    x = 65,064.30

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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.