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Finding the Fourth Proportional to 79,158.83, 109,239.36 and 42,860.66

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Solution

The fourth proportional to 79,158.83, 109,239.36 and 42,860.66 is: 59,147.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,158.83 : 109,239.36 = 42,860.66 : x
  2. Step 2: Convert to fraction form
    79,158.83/109,239.36 = 42,860.66/x
  3. Step 3: Cross multiply
    79,158.83x = 109,239.36 × 42,860.66
  4. Step 4: Simplify right side
    79,158.83x = 4,682,071,067.58
  5. Step 5: Solve for x
    x = 4,682,071,067.58/79,158.83
  6. Step 6: Final answer
    x = 59,147.81

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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.