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Finding the Fourth Proportional to 71,003.78, 97,985.20 and 39,172.68

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Solution

The fourth proportional to 71,003.78, 97,985.20 and 39,172.68 is: 54,058.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,003.78 : 97,985.20 = 39,172.68 : x
  2. Step 2: Convert to fraction form
    71,003.78/97,985.20 = 39,172.68/x
  3. Step 3: Cross multiply
    71,003.78x = 97,985.20 × 39,172.68
  4. Step 4: Simplify right side
    71,003.78x = 3,838,342,884.34
  5. Step 5: Solve for x
    x = 3,838,342,884.34/71,003.78
  6. Step 6: Final answer
    x = 54,058.29

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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.