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Finding the Fourth Proportional to 71,717.32, 98,968.50 and 39,885.54

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Solution

The fourth proportional to 71,717.32, 98,968.50 and 39,885.54 is: 55,041.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,717.32 : 98,968.50 = 39,885.54 : x
  2. Step 2: Convert to fraction form
    71,717.32/98,968.50 = 39,885.54/x
  3. Step 3: Cross multiply
    71,717.32x = 98,968.50 × 39,885.54
  4. Step 4: Simplify right side
    71,717.32x = 3,947,411,371.22
  5. Step 5: Solve for x
    x = 3,947,411,371.22/71,717.32
  6. Step 6: Final answer
    x = 55,041.26

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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.