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Finding the Fourth Proportional to 71,476.49, 98,638.87 and 39,212.76

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Solution

The fourth proportional to 71,476.49, 98,638.87 and 39,212.76 is: 54,114.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,476.49 : 98,638.87 = 39,212.76 : x
  2. Step 2: Convert to fraction form
    71,476.49/98,638.87 = 39,212.76/x
  3. Step 3: Cross multiply
    71,476.49x = 98,638.87 × 39,212.76
  4. Step 4: Simplify right side
    71,476.49x = 3,867,902,237.95
  5. Step 5: Solve for x
    x = 3,867,902,237.95/71,476.49
  6. Step 6: Final answer
    x = 54,114.33

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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.