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Finding the Fourth Proportional to 95.28, 143.64 and 90.06

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Solution

The fourth proportional to 95.28, 143.64 and 90.06 is: 135.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.28 : 143.64 = 90.06 : x
  2. Step 2: Convert to fraction form
    95.28/143.64 = 90.06/x
  3. Step 3: Cross multiply
    95.28x = 143.64 × 90.06
  4. Step 4: Simplify right side
    95.28x = 12,936.22
  5. Step 5: Solve for x
    x = 12,936.22/95.28
  6. Step 6: Final answer
    x = 135.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.