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Finding the Fourth Proportional to 110.09, 152.09 and 86.93

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Solution

The fourth proportional to 110.09, 152.09 and 86.93 is: 120.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.09 : 152.09 = 86.93 : x
  2. Step 2: Convert to fraction form
    110.09/152.09 = 86.93/x
  3. Step 3: Cross multiply
    110.09x = 152.09 × 86.93
  4. Step 4: Simplify right side
    110.09x = 13,220.75
  5. Step 5: Solve for x
    x = 13,220.75/110.09
  6. Step 6: Final answer
    x = 120.09

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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.