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Finding the Fourth Proportional to 75,344.76, 103,979.03 and 45,135

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Solution

The fourth proportional to 75,344.76, 103,979.03 and 45,135 is: 62,288.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,344.76 : 103,979.03 = 45,135 : x
  2. Step 2: Convert to fraction form
    75,344.76/103,979.03 = 45,135/x
  3. Step 3: Cross multiply
    75,344.76x = 103,979.03 × 45,135
  4. Step 4: Simplify right side
    75,344.76x = 4,693,093,293.38
  5. Step 5: Solve for x
    x = 4,693,093,293.38/75,344.76
  6. Step 6: Final answer
    x = 62,288.25

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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.