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Finding the Fourth Proportional to 239,863.21, 359,729.13 and 90,091.91

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Solution

The fourth proportional to 239,863.21, 359,729.13 and 90,091.91 is: 135,113.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,863.21 : 359,729.13 = 90,091.91 : x
  2. Step 2: Convert to fraction form
    239,863.21/359,729.13 = 90,091.91/x
  3. Step 3: Cross multiply
    239,863.21x = 359,729.13 × 90,091.91
  4. Step 4: Simplify right side
    239,863.21x = 32,408,684,404.34
  5. Step 5: Solve for x
    x = 32,408,684,404.34/239,863.21
  6. Step 6: Final answer
    x = 135,113.20

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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.