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Finding the Fourth Proportional to 140.66, 210.51 and 125.30

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Solution

The fourth proportional to 140.66, 210.51 and 125.30 is: 187.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.66 : 210.51 = 125.30 : x
  2. Step 2: Convert to fraction form
    140.66/210.51 = 125.30/x
  3. Step 3: Cross multiply
    140.66x = 210.51 × 125.30
  4. Step 4: Simplify right side
    140.66x = 26,376.90
  5. Step 5: Solve for x
    x = 26,376.90/140.66
  6. Step 6: Final answer
    x = 187.52

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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.