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Finding the Fourth Proportional to 71,467.62, 98,625.80 and 39,638.57

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Solution

The fourth proportional to 71,467.62, 98,625.80 and 39,638.57 is: 54,701.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,467.62 : 98,625.80 = 39,638.57 : x
  2. Step 2: Convert to fraction form
    71,467.62/98,625.80 = 39,638.57/x
  3. Step 3: Cross multiply
    71,467.62x = 98,625.80 × 39,638.57
  4. Step 4: Simplify right side
    71,467.62x = 3,909,385,283.07
  5. Step 5: Solve for x
    x = 3,909,385,283.07/71,467.62
  6. Step 6: Final answer
    x = 54,701.49

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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.