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Finding the Fourth Proportional to 94.72, 141.02 and 90.07

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Solution

The fourth proportional to 94.72, 141.02 and 90.07 is: 134.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.72 : 141.02 = 90.07 : x
  2. Step 2: Convert to fraction form
    94.72/141.02 = 90.07/x
  3. Step 3: Cross multiply
    94.72x = 141.02 × 90.07
  4. Step 4: Simplify right side
    94.72x = 12,701.67
  5. Step 5: Solve for x
    x = 12,701.67/94.72
  6. Step 6: Final answer
    x = 134.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.