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Finding the Fourth Proportional to 154,142.88, 231,213.20 and 79,283.88

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Solution

The fourth proportional to 154,142.88, 231,213.20 and 79,283.88 is: 118,925.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,142.88 : 231,213.20 = 79,283.88 : x
  2. Step 2: Convert to fraction form
    154,142.88/231,213.20 = 79,283.88/x
  3. Step 3: Cross multiply
    154,142.88x = 231,213.20 × 79,283.88
  4. Step 4: Simplify right side
    154,142.88x = 18,331,479,603.22
  5. Step 5: Solve for x
    x = 18,331,479,603.22/154,142.88
  6. Step 6: Final answer
    x = 118,925.24

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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.