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Finding the Fourth Proportional to 71,456.98, 98,611.62 and 39,194.40

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Solution

The fourth proportional to 71,456.98, 98,611.62 and 39,194.40 is: 54,088.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,456.98 : 98,611.62 = 39,194.40 : x
  2. Step 2: Convert to fraction form
    71,456.98/98,611.62 = 39,194.40/x
  3. Step 3: Cross multiply
    71,456.98x = 98,611.62 × 39,194.40
  4. Step 4: Simplify right side
    71,456.98x = 3,865,023,278.93
  5. Step 5: Solve for x
    x = 3,865,023,278.93/71,456.98
  6. Step 6: Final answer
    x = 54,088.81

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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.