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Finding the Fourth Proportional to 94.80, 141.99 and 91.77

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Solution

The fourth proportional to 94.80, 141.99 and 91.77 is: 137.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.80 : 141.99 = 91.77 : x
  2. Step 2: Convert to fraction form
    94.80/141.99 = 91.77/x
  3. Step 3: Cross multiply
    94.80x = 141.99 × 91.77
  4. Step 4: Simplify right side
    94.80x = 13,030.42
  5. Step 5: Solve for x
    x = 13,030.42/94.80
  6. Step 6: Final answer
    x = 137.45

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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.