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Finding the Fourth Proportional to 86,372.44, 129,266 and 53,113.56

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Solution

The fourth proportional to 86,372.44, 129,266 and 53,113.56 is: 79,490.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,372.44 : 129,266 = 53,113.56 : x
  2. Step 2: Convert to fraction form
    86,372.44/129,266 = 53,113.56/x
  3. Step 3: Cross multiply
    86,372.44x = 129,266 × 53,113.56
  4. Step 4: Simplify right side
    86,372.44x = 6,865,777,446.96
  5. Step 5: Solve for x
    x = 6,865,777,446.96/86,372.44
  6. Step 6: Final answer
    x = 79,490.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.