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Finding the Fourth Proportional to 79,286.40, 109,420.29 and 52,381.71

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Solution

The fourth proportional to 79,286.40, 109,420.29 and 52,381.71 is: 72,290.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,286.40 : 109,420.29 = 52,381.71 : x
  2. Step 2: Convert to fraction form
    79,286.40/109,420.29 = 52,381.71/x
  3. Step 3: Cross multiply
    79,286.40x = 109,420.29 × 52,381.71
  4. Step 4: Simplify right side
    79,286.40x = 5,731,621,898.90
  5. Step 5: Solve for x
    x = 5,731,621,898.90/79,286.40
  6. Step 6: Final answer
    x = 72,290.10

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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.