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Finding the Fourth Proportional to 142.39, 196.70 and 110.05

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Solution

The fourth proportional to 142.39, 196.70 and 110.05 is: 152.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.39 : 196.70 = 110.05 : x
  2. Step 2: Convert to fraction form
    142.39/196.70 = 110.05/x
  3. Step 3: Cross multiply
    142.39x = 196.70 × 110.05
  4. Step 4: Simplify right side
    142.39x = 21,646.84
  5. Step 5: Solve for x
    x = 21,646.84/142.39
  6. Step 6: Final answer
    x = 152.02

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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.