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Finding the Fourth Proportional to 71,751.49, 99,044.13 and 61,639.36

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Solution

The fourth proportional to 71,751.49, 99,044.13 and 61,639.36 is: 85,085.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,751.49 : 99,044.13 = 61,639.36 : x
  2. Step 2: Convert to fraction form
    71,751.49/99,044.13 = 61,639.36/x
  3. Step 3: Cross multiply
    71,751.49x = 99,044.13 × 61,639.36
  4. Step 4: Simplify right side
    71,751.49x = 6,105,016,784.96
  5. Step 5: Solve for x
    x = 6,105,016,784.96/71,751.49
  6. Step 6: Final answer
    x = 85,085.58

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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.