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Finding the Fourth Proportional to 102.76, 153.30 and 93.64

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Solution

The fourth proportional to 102.76, 153.30 and 93.64 is: 139.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.76 : 153.30 = 93.64 : x
  2. Step 2: Convert to fraction form
    102.76/153.30 = 93.64/x
  3. Step 3: Cross multiply
    102.76x = 153.30 × 93.64
  4. Step 4: Simplify right side
    102.76x = 14,355.01
  5. Step 5: Solve for x
    x = 14,355.01/102.76
  6. Step 6: Final answer
    x = 139.69

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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.