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Finding the Fourth Proportional to 143.61, 198.08 and 94.40

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Solution

The fourth proportional to 143.61, 198.08 and 94.40 is: 130.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.61 : 198.08 = 94.40 : x
  2. Step 2: Convert to fraction form
    143.61/198.08 = 94.40/x
  3. Step 3: Cross multiply
    143.61x = 198.08 × 94.40
  4. Step 4: Simplify right side
    143.61x = 18,697.76
  5. Step 5: Solve for x
    x = 18,697.76/143.61
  6. Step 6: Final answer
    x = 130.20

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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.