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Finding the Fourth Proportional to 157.65, 217.48 and 130.13

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Solution

The fourth proportional to 157.65, 217.48 and 130.13 is: 179.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.65 : 217.48 = 130.13 : x
  2. Step 2: Convert to fraction form
    157.65/217.48 = 130.13/x
  3. Step 3: Cross multiply
    157.65x = 217.48 × 130.13
  4. Step 4: Simplify right side
    157.65x = 28,300.67
  5. Step 5: Solve for x
    x = 28,300.67/157.65
  6. Step 6: Final answer
    x = 179.52

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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.