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Finding the Fourth Proportional to 73.68, 111 and 57.76

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Solution

The fourth proportional to 73.68, 111 and 57.76 is: 87.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.68 : 111 = 57.76 : x
  2. Step 2: Convert to fraction form
    73.68/111 = 57.76/x
  3. Step 3: Cross multiply
    73.68x = 111 × 57.76
  4. Step 4: Simplify right side
    73.68x = 6,411.36
  5. Step 5: Solve for x
    x = 6,411.36/73.68
  6. Step 6: Final answer
    x = 87.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.