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Finding the Fourth Proportional to 71,003.74, 97,985.48 and 39,172.64

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Solution

The fourth proportional to 71,003.74, 97,985.48 and 39,172.64 is: 54,058.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,003.74 : 97,985.48 = 39,172.64 : x
  2. Step 2: Convert to fraction form
    71,003.74/97,985.48 = 39,172.64/x
  3. Step 3: Cross multiply
    71,003.74x = 97,985.48 × 39,172.64
  4. Step 4: Simplify right side
    71,003.74x = 3,838,349,933.27
  5. Step 5: Solve for x
    x = 3,838,349,933.27/71,003.74
  6. Step 6: Final answer
    x = 54,058.42

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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.