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Finding the Fourth Proportional to 140.32, 210.14 and 96.87

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Solution

The fourth proportional to 140.32, 210.14 and 96.87 is: 145.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.32 : 210.14 = 96.87 : x
  2. Step 2: Convert to fraction form
    140.32/210.14 = 96.87/x
  3. Step 3: Cross multiply
    140.32x = 210.14 × 96.87
  4. Step 4: Simplify right side
    140.32x = 20,354.99
  5. Step 5: Solve for x
    x = 20,354.99/140.32
  6. Step 6: Final answer
    x = 145.06

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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.