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Finding the Fourth Proportional to 147.52, 221.12 and 56.15

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Solution

The fourth proportional to 147.52, 221.12 and 56.15 is: 84.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.52 : 221.12 = 56.15 : x
  2. Step 2: Convert to fraction form
    147.52/221.12 = 56.15/x
  3. Step 3: Cross multiply
    147.52x = 221.12 × 56.15
  4. Step 4: Simplify right side
    147.52x = 12,415.61
  5. Step 5: Solve for x
    x = 12,415.61/147.52
  6. Step 6: Final answer
    x = 84.17

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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.