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Finding the Fourth Proportional to 71,671.92, 98,908.44 and 39,407.88

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Solution

The fourth proportional to 71,671.92, 98,908.44 and 39,407.88 is: 54,383.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,671.92 : 98,908.44 = 39,407.88 : x
  2. Step 2: Convert to fraction form
    71,671.92/98,908.44 = 39,407.88/x
  3. Step 3: Cross multiply
    71,671.92x = 98,908.44 × 39,407.88
  4. Step 4: Simplify right side
    71,671.92x = 3,897,771,934.51
  5. Step 5: Solve for x
    x = 3,897,771,934.51/71,671.92
  6. Step 6: Final answer
    x = 54,383.53

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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.