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Finding the Fourth Proportional to 111.49, 153.85 and 62.36

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Solution

The fourth proportional to 111.49, 153.85 and 62.36 is: 86.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.49 : 153.85 = 62.36 : x
  2. Step 2: Convert to fraction form
    111.49/153.85 = 62.36/x
  3. Step 3: Cross multiply
    111.49x = 153.85 × 62.36
  4. Step 4: Simplify right side
    111.49x = 9,594.31
  5. Step 5: Solve for x
    x = 9,594.31/111.49
  6. Step 6: Final answer
    x = 86.06

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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.