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Finding the Fourth Proportional to 85,488.75, 117,971.28 and 49,195.80

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Solution

The fourth proportional to 85,488.75, 117,971.28 and 49,195.80 is: 67,888.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,488.75 : 117,971.28 = 49,195.80 : x
  2. Step 2: Convert to fraction form
    85,488.75/117,971.28 = 49,195.80/x
  3. Step 3: Cross multiply
    85,488.75x = 117,971.28 × 49,195.80
  4. Step 4: Simplify right side
    85,488.75x = 5,803,691,496.62
  5. Step 5: Solve for x
    x = 5,803,691,496.62/85,488.75
  6. Step 6: Final answer
    x = 67,888.37

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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.