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Finding the Fourth Proportional to 94.79, 141.98 and 83.40

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Solution

The fourth proportional to 94.79, 141.98 and 83.40 is: 124.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.79 : 141.98 = 83.40 : x
  2. Step 2: Convert to fraction form
    94.79/141.98 = 83.40/x
  3. Step 3: Cross multiply
    94.79x = 141.98 × 83.40
  4. Step 4: Simplify right side
    94.79x = 11,840.72
  5. Step 5: Solve for x
    x = 11,840.72/94.79
  6. Step 6: Final answer
    x = 124.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.