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Finding the Fourth Proportional to 71,671.28, 107,048.61 and 64,906.79

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Solution

The fourth proportional to 71,671.28, 107,048.61 and 64,906.79 is: 96,945.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,671.28 : 107,048.61 = 64,906.79 : x
  2. Step 2: Convert to fraction form
    71,671.28/107,048.61 = 64,906.79/x
  3. Step 3: Cross multiply
    71,671.28x = 107,048.61 × 64,906.79
  4. Step 4: Simplify right side
    71,671.28x = 6,948,181,916.68
  5. Step 5: Solve for x
    x = 6,948,181,916.68/71,671.28
  6. Step 6: Final answer
    x = 96,945.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.