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Finding the Fourth Proportional to 79,672.35, 109,943.55 and 45,679.20

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Solution

The fourth proportional to 79,672.35, 109,943.55 and 45,679.20 is: 63,034.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,672.35 : 109,943.55 = 45,679.20 : x
  2. Step 2: Convert to fraction form
    79,672.35/109,943.55 = 45,679.20/x
  3. Step 3: Cross multiply
    79,672.35x = 109,943.55 × 45,679.20
  4. Step 4: Simplify right side
    79,672.35x = 5,022,133,409.16
  5. Step 5: Solve for x
    x = 5,022,133,409.16/79,672.35
  6. Step 6: Final answer
    x = 63,034.83

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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.