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Finding the Fourth Proportional to 94.89, 130.86 and 70.39

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Solution

The fourth proportional to 94.89, 130.86 and 70.39 is: 97.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.89 : 130.86 = 70.39 : x
  2. Step 2: Convert to fraction form
    94.89/130.86 = 70.39/x
  3. Step 3: Cross multiply
    94.89x = 130.86 × 70.39
  4. Step 4: Simplify right side
    94.89x = 9,211.24
  5. Step 5: Solve for x
    x = 9,211.24/94.89
  6. Step 6: Final answer
    x = 97.07

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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.