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Finding the Fourth Proportional to 71,184.78, 98,231.07 and 39,351.78

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Solution

The fourth proportional to 71,184.78, 98,231.07 and 39,351.78 is: 54,303.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,184.78 : 98,231.07 = 39,351.78 : x
  2. Step 2: Convert to fraction form
    71,184.78/98,231.07 = 39,351.78/x
  3. Step 3: Cross multiply
    71,184.78x = 98,231.07 × 39,351.78
  4. Step 4: Simplify right side
    71,184.78x = 3,865,567,455.80
  5. Step 5: Solve for x
    x = 3,865,567,455.80/71,184.78
  6. Step 6: Final answer
    x = 54,303.29

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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.