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Finding the Fourth Proportional to 71,893.72, 108,228.79 and 64,660.18

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Solution

The fourth proportional to 71,893.72, 108,228.79 and 64,660.18 is: 97,339.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,893.72 : 108,228.79 = 64,660.18 : x
  2. Step 2: Convert to fraction form
    71,893.72/108,228.79 = 64,660.18/x
  3. Step 3: Cross multiply
    71,893.72x = 108,228.79 × 64,660.18
  4. Step 4: Simplify right side
    71,893.72x = 6,998,093,042.58
  5. Step 5: Solve for x
    x = 6,998,093,042.58/71,893.72
  6. Step 6: Final answer
    x = 97,339.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.