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Finding the Fourth Proportional to 79,268, 109,390.32 and 43,458.08

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Solution

The fourth proportional to 79,268, 109,390.32 and 43,458.08 is: 59,972.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,268 : 109,390.32 = 43,458.08 : x
  2. Step 2: Convert to fraction form
    79,268/109,390.32 = 43,458.08/x
  3. Step 3: Cross multiply
    79,268x = 109,390.32 × 43,458.08
  4. Step 4: Simplify right side
    79,268x = 4,753,893,277.79
  5. Step 5: Solve for x
    x = 4,753,893,277.79/79,268
  6. Step 6: Final answer
    x = 59,972.41

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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.