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Finding the Fourth Proportional to 187.84, 259.32 and 129.52

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Solution

The fourth proportional to 187.84, 259.32 and 129.52 is: 178.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.84 : 259.32 = 129.52 : x
  2. Step 2: Convert to fraction form
    187.84/259.32 = 129.52/x
  3. Step 3: Cross multiply
    187.84x = 259.32 × 129.52
  4. Step 4: Simplify right side
    187.84x = 33,587.21
  5. Step 5: Solve for x
    x = 33,587.21/187.84
  6. Step 6: Final answer
    x = 178.81

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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.