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Finding the Fourth Proportional to 79,418.84, 109,599.90 and 43,121.82

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Solution

The fourth proportional to 79,418.84, 109,599.90 and 43,121.82 is: 59,509.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,418.84 : 109,599.90 = 43,121.82 : x
  2. Step 2: Convert to fraction form
    79,418.84/109,599.90 = 43,121.82/x
  3. Step 3: Cross multiply
    79,418.84x = 109,599.90 × 43,121.82
  4. Step 4: Simplify right side
    79,418.84x = 4,726,147,159.82
  5. Step 5: Solve for x
    x = 4,726,147,159.82/79,418.84
  6. Step 6: Final answer
    x = 59,509.15

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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.