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Finding the Fourth Proportional to 157.68, 216.18 and 145.62

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Solution

The fourth proportional to 157.68, 216.18 and 145.62 is: 199.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.68 : 216.18 = 145.62 : x
  2. Step 2: Convert to fraction form
    157.68/216.18 = 145.62/x
  3. Step 3: Cross multiply
    157.68x = 216.18 × 145.62
  4. Step 4: Simplify right side
    157.68x = 31,480.13
  5. Step 5: Solve for x
    x = 31,480.13/157.68
  6. Step 6: Final answer
    x = 199.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.