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Finding the Fourth Proportional to 95.01, 130.25 and 90.78

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Solution

The fourth proportional to 95.01, 130.25 and 90.78 is: 124.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.01 : 130.25 = 90.78 : x
  2. Step 2: Convert to fraction form
    95.01/130.25 = 90.78/x
  3. Step 3: Cross multiply
    95.01x = 130.25 × 90.78
  4. Step 4: Simplify right side
    95.01x = 11,824.10
  5. Step 5: Solve for x
    x = 11,824.10/95.01
  6. Step 6: Final answer
    x = 124.45

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.