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Finding the Fourth Proportional to 110.51, 152.45 and 87.12

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Solution

The fourth proportional to 110.51, 152.45 and 87.12 is: 120.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.51 : 152.45 = 87.12 : x
  2. Step 2: Convert to fraction form
    110.51/152.45 = 87.12/x
  3. Step 3: Cross multiply
    110.51x = 152.45 × 87.12
  4. Step 4: Simplify right side
    110.51x = 13,281.01
  5. Step 5: Solve for x
    x = 13,281.01/110.51
  6. Step 6: Final answer
    x = 120.18

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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.