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Finding the Fourth Proportional to 156.09, 232.89 and 140.76

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Solution

The fourth proportional to 156.09, 232.89 and 140.76 is: 210.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.09 : 232.89 = 140.76 : x
  2. Step 2: Convert to fraction form
    156.09/232.89 = 140.76/x
  3. Step 3: Cross multiply
    156.09x = 232.89 × 140.76
  4. Step 4: Simplify right side
    156.09x = 32,781.60
  5. Step 5: Solve for x
    x = 32,781.60/156.09
  6. Step 6: Final answer
    x = 210.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.