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Finding the Fourth Proportional to 124.40, 188.80 and 124.40

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Solution

The fourth proportional to 124.40, 188.80 and 124.40 is: 188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.40 : 188.80 = 124.40 : x
  2. Step 2: Convert to fraction form
    124.40/188.80 = 124.40/x
  3. Step 3: Cross multiply
    124.40x = 188.80 × 124.40
  4. Step 4: Simplify right side
    124.40x = 23,486.72
  5. Step 5: Solve for x
    x = 23,486.72/124.40
  6. Step 6: Final answer
    x = 188.80

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.