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Finding the Fourth Proportional to 136.04, 188.10 and 117.80

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Solution

The fourth proportional to 136.04, 188.10 and 117.80 is: 162.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.04 : 188.10 = 117.80 : x
  2. Step 2: Convert to fraction form
    136.04/188.10 = 117.80/x
  3. Step 3: Cross multiply
    136.04x = 188.10 × 117.80
  4. Step 4: Simplify right side
    136.04x = 22,158.18
  5. Step 5: Solve for x
    x = 22,158.18/136.04
  6. Step 6: Final answer
    x = 162.88

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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.