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Finding the Fourth Proportional to 112.98, 156.62 and 111.08

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Solution

The fourth proportional to 112.98, 156.62 and 111.08 is: 153.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.98 : 156.62 = 111.08 : x
  2. Step 2: Convert to fraction form
    112.98/156.62 = 111.08/x
  3. Step 3: Cross multiply
    112.98x = 156.62 × 111.08
  4. Step 4: Simplify right side
    112.98x = 17,397.35
  5. Step 5: Solve for x
    x = 17,397.35/112.98
  6. Step 6: Final answer
    x = 153.99

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.