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Finding the Fourth Proportional to 102.95, 142.18 and 94.18

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Solution

The fourth proportional to 102.95, 142.18 and 94.18 is: 130.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.95 : 142.18 = 94.18 : x
  2. Step 2: Convert to fraction form
    102.95/142.18 = 94.18/x
  3. Step 3: Cross multiply
    102.95x = 142.18 × 94.18
  4. Step 4: Simplify right side
    102.95x = 13,390.16
  5. Step 5: Solve for x
    x = 13,390.16/102.95
  6. Step 6: Final answer
    x = 130.06

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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.