Home / 135,820.56-187,432.32-79,221

Finding the Fourth Proportional to 135,820.56, 187,432.32 and 79,221

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Solution

The fourth proportional to 135,820.56, 187,432.32 and 79,221 is: 109,324.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,820.56 : 187,432.32 = 79,221 : x
  2. Step 2: Convert to fraction form
    135,820.56/187,432.32 = 79,221/x
  3. Step 3: Cross multiply
    135,820.56x = 187,432.32 × 79,221
  4. Step 4: Simplify right side
    135,820.56x = 14,848,575,822.72
  5. Step 5: Solve for x
    x = 14,848,575,822.72/135,820.56
  6. Step 6: Final answer
    x = 109,324.95

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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.