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Finding the Fourth Proportional to 94.79, 130.75 and 57.89

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Solution

The fourth proportional to 94.79, 130.75 and 57.89 is: 79.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.79 : 130.75 = 57.89 : x
  2. Step 2: Convert to fraction form
    94.79/130.75 = 57.89/x
  3. Step 3: Cross multiply
    94.79x = 130.75 × 57.89
  4. Step 4: Simplify right side
    94.79x = 7,569.30
  5. Step 5: Solve for x
    x = 7,569.30/94.79
  6. Step 6: Final answer
    x = 79.85

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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.