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Finding the Fourth Proportional to 154,138, 231,207 and 43,330

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Solution

The fourth proportional to 154,138, 231,207 and 43,330 is: 64,995

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,138 : 231,207 = 43,330 : x
  2. Step 2: Convert to fraction form
    154,138/231,207 = 43,330/x
  3. Step 3: Cross multiply
    154,138x = 231,207 × 43,330
  4. Step 4: Simplify right side
    154,138x = 10,018,199,310
  5. Step 5: Solve for x
    x = 10,018,199,310/154,138
  6. Step 6: Final answer
    x = 64,995

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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.