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Finding the Fourth Proportional to 79,390.92, 109,568.19 and 45,402.57

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Solution

The fourth proportional to 79,390.92, 109,568.19 and 45,402.57 is: 62,660.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,390.92 : 109,568.19 = 45,402.57 : x
  2. Step 2: Convert to fraction form
    79,390.92/109,568.19 = 45,402.57/x
  3. Step 3: Cross multiply
    79,390.92x = 109,568.19 × 45,402.57
  4. Step 4: Simplify right side
    79,390.92x = 4,974,677,135.48
  5. Step 5: Solve for x
    x = 4,974,677,135.48/79,390.92
  6. Step 6: Final answer
    x = 62,660.53

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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.