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Finding the Fourth Proportional to 154,165.78, 231,064.59 and 79,321.78

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Solution

The fourth proportional to 154,165.78, 231,064.59 and 79,321.78 is: 118,887.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,165.78 : 231,064.59 = 79,321.78 : x
  2. Step 2: Convert to fraction form
    154,165.78/231,064.59 = 79,321.78/x
  3. Step 3: Cross multiply
    154,165.78x = 231,064.59 × 79,321.78
  4. Step 4: Simplify right side
    154,165.78x = 18,328,453,418.45
  5. Step 5: Solve for x
    x = 18,328,453,418.45/154,165.78
  6. Step 6: Final answer
    x = 118,887.95

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1.5x scale

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.