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Finding the Fourth Proportional to 187.95, 259.51 and 143.77

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Solution

The fourth proportional to 187.95, 259.51 and 143.77 is: 198.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.95 : 259.51 = 143.77 : x
  2. Step 2: Convert to fraction form
    187.95/259.51 = 143.77/x
  3. Step 3: Cross multiply
    187.95x = 259.51 × 143.77
  4. Step 4: Simplify right side
    187.95x = 37,309.75
  5. Step 5: Solve for x
    x = 37,309.75/187.95
  6. Step 6: Final answer
    x = 198.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.