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Finding the Fourth Proportional to 156.12, 232.98 and 143.94

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Solution

The fourth proportional to 156.12, 232.98 and 143.94 is: 214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.12 : 232.98 = 143.94 : x
  2. Step 2: Convert to fraction form
    156.12/232.98 = 143.94/x
  3. Step 3: Cross multiply
    156.12x = 232.98 × 143.94
  4. Step 4: Simplify right side
    156.12x = 33,535.14
  5. Step 5: Solve for x
    x = 33,535.14/156.12
  6. Step 6: Final answer
    x = 214.80

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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.