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Finding the Fourth Proportional to 188.40, 259.56 and 130.08

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Solution

The fourth proportional to 188.40, 259.56 and 130.08 is: 179.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.40 : 259.56 = 130.08 : x
  2. Step 2: Convert to fraction form
    188.40/259.56 = 130.08/x
  3. Step 3: Cross multiply
    188.40x = 259.56 × 130.08
  4. Step 4: Simplify right side
    188.40x = 33,763.56
  5. Step 5: Solve for x
    x = 33,763.56/188.40
  6. Step 6: Final answer
    x = 179.21

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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.