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Finding the Fourth Proportional to 156.70, 235.18 and 102.65

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Solution

The fourth proportional to 156.70, 235.18 and 102.65 is: 154.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.70 : 235.18 = 102.65 : x
  2. Step 2: Convert to fraction form
    156.70/235.18 = 102.65/x
  3. Step 3: Cross multiply
    156.70x = 235.18 × 102.65
  4. Step 4: Simplify right side
    156.70x = 24,141.23
  5. Step 5: Solve for x
    x = 24,141.23/156.70
  6. Step 6: Final answer
    x = 154.07

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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.