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Finding the Fourth Proportional to 86,443.72, 129,679.41 and 36,524.30

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Solution

The fourth proportional to 86,443.72, 129,679.41 and 36,524.30 is: 54,792.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,443.72 : 129,679.41 = 36,524.30 : x
  2. Step 2: Convert to fraction form
    86,443.72/129,679.41 = 36,524.30/x
  3. Step 3: Cross multiply
    86,443.72x = 129,679.41 × 36,524.30
  4. Step 4: Simplify right side
    86,443.72x = 4,736,449,026.27
  5. Step 5: Solve for x
    x = 4,736,449,026.27/86,443.72
  6. Step 6: Final answer
    x = 54,792.29

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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.