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Finding the Fourth Proportional to 118.43, 177.64 and 70.19

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Solution

The fourth proportional to 118.43, 177.64 and 70.19 is: 105.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.43 : 177.64 = 70.19 : x
  2. Step 2: Convert to fraction form
    118.43/177.64 = 70.19/x
  3. Step 3: Cross multiply
    118.43x = 177.64 × 70.19
  4. Step 4: Simplify right side
    118.43x = 12,467.31
  5. Step 5: Solve for x
    x = 12,467.31/118.43
  6. Step 6: Final answer
    x = 105.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.