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Finding the Fourth Proportional to 155.93, 216.18 and 147.72

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Solution

The fourth proportional to 155.93, 216.18 and 147.72 is: 204.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.93 : 216.18 = 147.72 : x
  2. Step 2: Convert to fraction form
    155.93/216.18 = 147.72/x
  3. Step 3: Cross multiply
    155.93x = 216.18 × 147.72
  4. Step 4: Simplify right side
    155.93x = 31,934.11
  5. Step 5: Solve for x
    x = 31,934.11/155.93
  6. Step 6: Final answer
    x = 204.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.