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Finding the Fourth Proportional to 71,751.48, 99,153.60 and 53,815.36

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Solution

The fourth proportional to 71,751.48, 99,153.60 and 53,815.36 is: 74,367.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,751.48 : 99,153.60 = 53,815.36 : x
  2. Step 2: Convert to fraction form
    71,751.48/99,153.60 = 53,815.36/x
  3. Step 3: Cross multiply
    71,751.48x = 99,153.60 × 53,815.36
  4. Step 4: Simplify right side
    71,751.48x = 5,335,986,679.30
  5. Step 5: Solve for x
    x = 5,335,986,679.30/71,751.48
  6. Step 6: Final answer
    x = 74,367.62

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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.