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Finding the Fourth Proportional to 154,469.19, 213,170.72 and 87,401.19

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Solution

The fourth proportional to 154,469.19, 213,170.72 and 87,401.19 is: 120,615.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,469.19 : 213,170.72 = 87,401.19 : x
  2. Step 2: Convert to fraction form
    154,469.19/213,170.72 = 87,401.19/x
  3. Step 3: Cross multiply
    154,469.19x = 213,170.72 × 87,401.19
  4. Step 4: Simplify right side
    154,469.19x = 18,631,374,601.16
  5. Step 5: Solve for x
    x = 18,631,374,601.16/154,469.19
  6. Step 6: Final answer
    x = 120,615.47

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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.