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Finding the Fourth Proportional to 156.28, 215.63 and 135.52

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Solution

The fourth proportional to 156.28, 215.63 and 135.52 is: 186.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.28 : 215.63 = 135.52 : x
  2. Step 2: Convert to fraction form
    156.28/215.63 = 135.52/x
  3. Step 3: Cross multiply
    156.28x = 215.63 × 135.52
  4. Step 4: Simplify right side
    156.28x = 29,222.18
  5. Step 5: Solve for x
    x = 29,222.18/156.28
  6. Step 6: Final answer
    x = 186.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.