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Finding the Fourth Proportional to 123.89, 170.99 and 110.93

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Solution

The fourth proportional to 123.89, 170.99 and 110.93 is: 153.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.89 : 170.99 = 110.93 : x
  2. Step 2: Convert to fraction form
    123.89/170.99 = 110.93/x
  3. Step 3: Cross multiply
    123.89x = 170.99 × 110.93
  4. Step 4: Simplify right side
    123.89x = 18,967.37
  5. Step 5: Solve for x
    x = 18,967.37/123.89
  6. Step 6: Final answer
    x = 153.10

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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.