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Finding the Fourth Proportional to 156.48, 216.24 and 115.08

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Solution

The fourth proportional to 156.48, 216.24 and 115.08 is: 159.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.48 : 216.24 = 115.08 : x
  2. Step 2: Convert to fraction form
    156.48/216.24 = 115.08/x
  3. Step 3: Cross multiply
    156.48x = 216.24 × 115.08
  4. Step 4: Simplify right side
    156.48x = 24,884.90
  5. Step 5: Solve for x
    x = 24,884.90/156.48
  6. Step 6: Final answer
    x = 159.03

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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.