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Finding the Fourth Proportional to 148.79, 221.63 and 141.77

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Solution

The fourth proportional to 148.79, 221.63 and 141.77 is: 211.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.79 : 221.63 = 141.77 : x
  2. Step 2: Convert to fraction form
    148.79/221.63 = 141.77/x
  3. Step 3: Cross multiply
    148.79x = 221.63 × 141.77
  4. Step 4: Simplify right side
    148.79x = 31,420.49
  5. Step 5: Solve for x
    x = 31,420.49/148.79
  6. Step 6: Final answer
    x = 211.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.