Home / 111,914.88-154,440-61,612.80

Finding the Fourth Proportional to 111,914.88, 154,440 and 61,612.80

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Solution

The fourth proportional to 111,914.88, 154,440 and 61,612.80 is: 85,024.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,914.88 : 154,440 = 61,612.80 : x
  2. Step 2: Convert to fraction form
    111,914.88/154,440 = 61,612.80/x
  3. Step 3: Cross multiply
    111,914.88x = 154,440 × 61,612.80
  4. Step 4: Simplify right side
    111,914.88x = 9,515,480,832
  5. Step 5: Solve for x
    x = 9,515,480,832/111,914.88
  6. Step 6: Final answer
    x = 85,024.27

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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.