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Finding the Fourth Proportional to 75,326.92, 103,979.10 and 64,673.80

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Solution

The fourth proportional to 75,326.92, 103,979.10 and 64,673.80 is: 89,273.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,326.92 : 103,979.10 = 64,673.80 : x
  2. Step 2: Convert to fraction form
    75,326.92/103,979.10 = 64,673.80/x
  3. Step 3: Cross multiply
    75,326.92x = 103,979.10 × 64,673.80
  4. Step 4: Simplify right side
    75,326.92x = 6,724,723,517.58
  5. Step 5: Solve for x
    x = 6,724,723,517.58/75,326.92
  6. Step 6: Final answer
    x = 89,273.84

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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.