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Finding the Fourth Proportional to 210.07, 315.47 and 125.11

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Solution

The fourth proportional to 210.07, 315.47 and 125.11 is: 187.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.07 : 315.47 = 125.11 : x
  2. Step 2: Convert to fraction form
    210.07/315.47 = 125.11/x
  3. Step 3: Cross multiply
    210.07x = 315.47 × 125.11
  4. Step 4: Simplify right side
    210.07x = 39,467.83
  5. Step 5: Solve for x
    x = 39,467.83/210.07
  6. Step 6: Final answer
    x = 187.88

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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.