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Finding the Fourth Proportional to 144.06, 216.18 and 90.06

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Solution

The fourth proportional to 144.06, 216.18 and 90.06 is: 135.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.06 : 216.18 = 90.06 : x
  2. Step 2: Convert to fraction form
    144.06/216.18 = 90.06/x
  3. Step 3: Cross multiply
    144.06x = 216.18 × 90.06
  4. Step 4: Simplify right side
    144.06x = 19,469.17
  5. Step 5: Solve for x
    x = 19,469.17/144.06
  6. Step 6: Final answer
    x = 135.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.