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Finding the Fourth Proportional to 98.04, 146.70 and 72.38

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Solution

The fourth proportional to 98.04, 146.70 and 72.38 is: 108.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.04 : 146.70 = 72.38 : x
  2. Step 2: Convert to fraction form
    98.04/146.70 = 72.38/x
  3. Step 3: Cross multiply
    98.04x = 146.70 × 72.38
  4. Step 4: Simplify right side
    98.04x = 10,618.15
  5. Step 5: Solve for x
    x = 10,618.15/98.04
  6. Step 6: Final answer
    x = 108.30

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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.