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Finding the Fourth Proportional to 147.32, 220.50 and 103.77

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Solution

The fourth proportional to 147.32, 220.50 and 103.77 is: 155.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.32 : 220.50 = 103.77 : x
  2. Step 2: Convert to fraction form
    147.32/220.50 = 103.77/x
  3. Step 3: Cross multiply
    147.32x = 220.50 × 103.77
  4. Step 4: Simplify right side
    147.32x = 22,881.29
  5. Step 5: Solve for x
    x = 22,881.29/147.32
  6. Step 6: Final answer
    x = 155.32

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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.