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Finding the Fourth Proportional to 79,165.95, 109,249.16 and 42,867.78

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Solution

The fourth proportional to 79,165.95, 109,249.16 and 42,867.78 is: 59,157.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,165.95 : 109,249.16 = 42,867.78 : x
  2. Step 2: Convert to fraction form
    79,165.95/109,249.16 = 42,867.78/x
  3. Step 3: Cross multiply
    79,165.95x = 109,249.16 × 42,867.78
  4. Step 4: Simplify right side
    79,165.95x = 4,683,268,741.73
  5. Step 5: Solve for x
    x = 4,683,268,741.73/79,165.95
  6. Step 6: Final answer
    x = 59,157.61

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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.