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Finding the Fourth Proportional to 79,311.71, 109,412.44 and 47,474.46

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Solution

The fourth proportional to 79,311.71, 109,412.44 and 47,474.46 is: 65,492.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,311.71 : 109,412.44 = 47,474.46 : x
  2. Step 2: Convert to fraction form
    79,311.71/109,412.44 = 47,474.46/x
  3. Step 3: Cross multiply
    79,311.71x = 109,412.44 × 47,474.46
  4. Step 4: Simplify right side
    79,311.71x = 5,194,296,387.60
  5. Step 5: Solve for x
    x = 5,194,296,387.60/79,311.71
  6. Step 6: Final answer
    x = 65,492.17

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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.