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Finding the Fourth Proportional to 71,456.90, 98,604.06 and 39,625.70

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Solution

The fourth proportional to 71,456.90, 98,604.06 and 39,625.70 is: 54,679.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,456.90 : 98,604.06 = 39,625.70 : x
  2. Step 2: Convert to fraction form
    71,456.90/98,604.06 = 39,625.70/x
  3. Step 3: Cross multiply
    71,456.90x = 98,604.06 × 39,625.70
  4. Step 4: Simplify right side
    71,456.90x = 3,907,254,900.34
  5. Step 5: Solve for x
    x = 3,907,254,900.34/71,456.90
  6. Step 6: Final answer
    x = 54,679.88

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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.