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Finding the Fourth Proportional to 79,391.92, 109,569.57 and 45,403.57

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Solution

The fourth proportional to 79,391.92, 109,569.57 and 45,403.57 is: 62,661.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,391.92 : 109,569.57 = 45,403.57 : x
  2. Step 2: Convert to fraction form
    79,391.92/109,569.57 = 45,403.57/x
  3. Step 3: Cross multiply
    79,391.92x = 109,569.57 × 45,403.57
  4. Step 4: Simplify right side
    79,391.92x = 4,974,849,414.35
  5. Step 5: Solve for x
    x = 4,974,849,414.35/79,391.92
  6. Step 6: Final answer
    x = 62,661.91

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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.