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Finding the Fourth Proportional to 71,717.73, 98,969.06 and 39,885.94

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Solution

The fourth proportional to 71,717.73, 98,969.06 and 39,885.94 is: 55,041.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,717.73 : 98,969.06 = 39,885.94 : x
  2. Step 2: Convert to fraction form
    71,717.73/98,969.06 = 39,885.94/x
  3. Step 3: Cross multiply
    71,717.73x = 98,969.06 × 39,885.94
  4. Step 4: Simplify right side
    71,717.73x = 3,947,473,988.08
  5. Step 5: Solve for x
    x = 3,947,473,988.08/71,717.73
  6. Step 6: Final answer
    x = 55,041.82

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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.