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Finding the Fourth Proportional to 148, 204.18 and 104.40

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Solution

The fourth proportional to 148, 204.18 and 104.40 is: 144.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    148 : 204.18 = 104.40 : x
  2. Step 2: Convert to fraction form
    148/204.18 = 104.40/x
  3. Step 3: Cross multiply
    148x = 204.18 × 104.40
  4. Step 4: Simplify right side
    148x = 21,316.39
  5. Step 5: Solve for x
    x = 21,316.39/148
  6. Step 6: Final answer
    x = 144.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.