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Finding the Fourth Proportional to 79,486.31, 109,691.07 and 43,678.63

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Solution

The fourth proportional to 79,486.31, 109,691.07 and 43,678.63 is: 60,276.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,486.31 : 109,691.07 = 43,678.63 : x
  2. Step 2: Convert to fraction form
    79,486.31/109,691.07 = 43,678.63/x
  3. Step 3: Cross multiply
    79,486.31x = 109,691.07 × 43,678.63
  4. Step 4: Simplify right side
    79,486.31x = 4,791,155,112.38
  5. Step 5: Solve for x
    x = 4,791,155,112.38/79,486.31
  6. Step 6: Final answer
    x = 60,276.49

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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.