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Finding the Fourth Proportional to 79,139.66, 109,212.84 and 43,329.92

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Solution

The fourth proportional to 79,139.66, 109,212.84 and 43,329.92 is: 59,795.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,139.66 : 109,212.84 = 43,329.92 : x
  2. Step 2: Convert to fraction form
    79,139.66/109,212.84 = 43,329.92/x
  3. Step 3: Cross multiply
    79,139.66x = 109,212.84 × 43,329.92
  4. Step 4: Simplify right side
    79,139.66x = 4,732,183,620.17
  5. Step 5: Solve for x
    x = 4,732,183,620.17/79,139.66
  6. Step 6: Final answer
    x = 59,795.35

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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.