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Finding the Fourth Proportional to 140.47, 210.42 and 102.03

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Solution

The fourth proportional to 140.47, 210.42 and 102.03 is: 152.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.47 : 210.42 = 102.03 : x
  2. Step 2: Convert to fraction form
    140.47/210.42 = 102.03/x
  3. Step 3: Cross multiply
    140.47x = 210.42 × 102.03
  4. Step 4: Simplify right side
    140.47x = 21,470.43
  5. Step 5: Solve for x
    x = 21,470.43/140.47
  6. Step 6: Final answer
    x = 152.85

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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.