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Finding the Fourth Proportional to 188.19, 259.60 and 113.45

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Solution

The fourth proportional to 188.19, 259.60 and 113.45 is: 156.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.19 : 259.60 = 113.45 : x
  2. Step 2: Convert to fraction form
    188.19/259.60 = 113.45/x
  3. Step 3: Cross multiply
    188.19x = 259.60 × 113.45
  4. Step 4: Simplify right side
    188.19x = 29,451.99
  5. Step 5: Solve for x
    x = 29,451.99/188.19
  6. Step 6: Final answer
    x = 156.50

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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.