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Finding the Fourth Proportional to 79,288, 109,420.76 and 43,479.39

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Solution

The fourth proportional to 79,288, 109,420.76 and 43,479.39 is: 60,003.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,288 : 109,420.76 = 43,479.39 : x
  2. Step 2: Convert to fraction form
    79,288/109,420.76 = 43,479.39/x
  3. Step 3: Cross multiply
    79,288x = 109,420.76 × 43,479.39
  4. Step 4: Simplify right side
    79,288x = 4,757,547,898.14
  5. Step 5: Solve for x
    x = 4,757,547,898.14/79,288
  6. Step 6: Final answer
    x = 60,003.38

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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.