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Finding the Fourth Proportional to 102.16, 153.24 and 48.08

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Solution

The fourth proportional to 102.16, 153.24 and 48.08 is: 72.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.16 : 153.24 = 48.08 : x
  2. Step 2: Convert to fraction form
    102.16/153.24 = 48.08/x
  3. Step 3: Cross multiply
    102.16x = 153.24 × 48.08
  4. Step 4: Simplify right side
    102.16x = 7,367.78
  5. Step 5: Solve for x
    x = 7,367.78/102.16
  6. Step 6: Final answer
    x = 72.12

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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.