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Finding the Fourth Proportional to 55.68, 76.68 and 50.76

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Solution

The fourth proportional to 55.68, 76.68 and 50.76 is: 69.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.68 : 76.68 = 50.76 : x
  2. Step 2: Convert to fraction form
    55.68/76.68 = 50.76/x
  3. Step 3: Cross multiply
    55.68x = 76.68 × 50.76
  4. Step 4: Simplify right side
    55.68x = 3,892.28
  5. Step 5: Solve for x
    x = 3,892.28/55.68
  6. Step 6: Final answer
    x = 69.90

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Find fourth proportional to 27.84, 38.34 and 25.38
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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.