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Finding the Fourth Proportional to 151.93, 210.62 and 143.72

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Solution

The fourth proportional to 151.93, 210.62 and 143.72 is: 199.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.93 : 210.62 = 143.72 : x
  2. Step 2: Convert to fraction form
    151.93/210.62 = 143.72/x
  3. Step 3: Cross multiply
    151.93x = 210.62 × 143.72
  4. Step 4: Simplify right side
    151.93x = 30,269.25
  5. Step 5: Solve for x
    x = 30,269.25/151.93
  6. Step 6: Final answer
    x = 199.24

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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.