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Finding the Fourth Proportional to 156.64, 215.67 and 148.94

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Solution

The fourth proportional to 156.64, 215.67 and 148.94 is: 205.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.64 : 215.67 = 148.94 : x
  2. Step 2: Convert to fraction form
    156.64/215.67 = 148.94/x
  3. Step 3: Cross multiply
    156.64x = 215.67 × 148.94
  4. Step 4: Simplify right side
    156.64x = 32,121.15
  5. Step 5: Solve for x
    x = 32,121.15/156.64
  6. Step 6: Final answer
    x = 205.07

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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.