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Finding the Fourth Proportional to 187.72, 259.05 and 109.06

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Solution

The fourth proportional to 187.72, 259.05 and 109.06 is: 150.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.72 : 259.05 = 109.06 : x
  2. Step 2: Convert to fraction form
    187.72/259.05 = 109.06/x
  3. Step 3: Cross multiply
    187.72x = 259.05 × 109.06
  4. Step 4: Simplify right side
    187.72x = 28,251.35
  5. Step 5: Solve for x
    x = 28,251.35/187.72
  6. Step 6: Final answer
    x = 150.50

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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.