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Finding the Fourth Proportional to 147.61, 221.29 and 102.05

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Solution

The fourth proportional to 147.61, 221.29 and 102.05 is: 152.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.61 : 221.29 = 102.05 : x
  2. Step 2: Convert to fraction form
    147.61/221.29 = 102.05/x
  3. Step 3: Cross multiply
    147.61x = 221.29 × 102.05
  4. Step 4: Simplify right side
    147.61x = 22,581.28
  5. Step 5: Solve for x
    x = 22,581.28/147.61
  6. Step 6: Final answer
    x = 152.98

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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.