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Finding the Fourth Proportional to 94.81, 130.89 and 61.63

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Solution

The fourth proportional to 94.81, 130.89 and 61.63 is: 85.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.81 : 130.89 = 61.63 : x
  2. Step 2: Convert to fraction form
    94.81/130.89 = 61.63/x
  3. Step 3: Cross multiply
    94.81x = 130.89 × 61.63
  4. Step 4: Simplify right side
    94.81x = 8,066.75
  5. Step 5: Solve for x
    x = 8,066.75/94.81
  6. Step 6: Final answer
    x = 85.08

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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.