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Finding the Fourth Proportional to 71,647.40, 98,873.52 and 39,815.48

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Solution

The fourth proportional to 71,647.40, 98,873.52 and 39,815.48 is: 54,945.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,647.40 : 98,873.52 = 39,815.48 : x
  2. Step 2: Convert to fraction form
    71,647.40/98,873.52 = 39,815.48/x
  3. Step 3: Cross multiply
    71,647.40x = 98,873.52 × 39,815.48
  4. Step 4: Simplify right side
    71,647.40x = 3,936,696,658.09
  5. Step 5: Solve for x
    x = 3,936,696,658.09/71,647.40
  6. Step 6: Final answer
    x = 54,945.42

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1.5x scale

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.