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Finding the Fourth Proportional to 144.02, 216.02 and 98.40

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Solution

The fourth proportional to 144.02, 216.02 and 98.40 is: 147.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.02 : 216.02 = 98.40 : x
  2. Step 2: Convert to fraction form
    144.02/216.02 = 98.40/x
  3. Step 3: Cross multiply
    144.02x = 216.02 × 98.40
  4. Step 4: Simplify right side
    144.02x = 21,256.37
  5. Step 5: Solve for x
    x = 21,256.37/144.02
  6. Step 6: Final answer
    x = 147.59

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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.