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Finding the Fourth Proportional to 71,713.36, 98,965.02 and 39,881.58

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Solution

The fourth proportional to 71,713.36, 98,965.02 and 39,881.58 is: 55,036.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,713.36 : 98,965.02 = 39,881.58 : x
  2. Step 2: Convert to fraction form
    71,713.36/98,965.02 = 39,881.58/x
  3. Step 3: Cross multiply
    71,713.36x = 98,965.02 × 39,881.58
  4. Step 4: Simplify right side
    71,713.36x = 3,946,881,362.33
  5. Step 5: Solve for x
    x = 3,946,881,362.33/71,713.36
  6. Step 6: Final answer
    x = 55,036.90

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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.