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Finding the Fourth Proportional to 102.02, 152.51 and 76.10

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Solution

The fourth proportional to 102.02, 152.51 and 76.10 is: 113.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.02 : 152.51 = 76.10 : x
  2. Step 2: Convert to fraction form
    102.02/152.51 = 76.10/x
  3. Step 3: Cross multiply
    102.02x = 152.51 × 76.10
  4. Step 4: Simplify right side
    102.02x = 11,606.01
  5. Step 5: Solve for x
    x = 11,606.01/102.02
  6. Step 6: Final answer
    x = 113.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.