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Finding the Fourth Proportional to 152.44, 210.09 and 124.72

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Solution

The fourth proportional to 152.44, 210.09 and 124.72 is: 171.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.44 : 210.09 = 124.72 : x
  2. Step 2: Convert to fraction form
    152.44/210.09 = 124.72/x
  3. Step 3: Cross multiply
    152.44x = 210.09 × 124.72
  4. Step 4: Simplify right side
    152.44x = 26,202.42
  5. Step 5: Solve for x
    x = 26,202.42/152.44
  6. Step 6: Final answer
    x = 171.89

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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.