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Finding the Fourth Proportional to 79,215.40, 109,226.82 and 63,289

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Solution

The fourth proportional to 79,215.40, 109,226.82 and 63,289 is: 87,266.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,215.40 : 109,226.82 = 63,289 : x
  2. Step 2: Convert to fraction form
    79,215.40/109,226.82 = 63,289/x
  3. Step 3: Cross multiply
    79,215.40x = 109,226.82 × 63,289
  4. Step 4: Simplify right side
    79,215.40x = 6,912,856,210.98
  5. Step 5: Solve for x
    x = 6,912,856,210.98/79,215.40
  6. Step 6: Final answer
    x = 87,266.57

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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.