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Finding the Fourth Proportional to 60.72, 83.81 and 57.69

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Solution

The fourth proportional to 60.72, 83.81 and 57.69 is: 79.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.72 : 83.81 = 57.69 : x
  2. Step 2: Convert to fraction form
    60.72/83.81 = 57.69/x
  3. Step 3: Cross multiply
    60.72x = 83.81 × 57.69
  4. Step 4: Simplify right side
    60.72x = 4,834.71
  5. Step 5: Solve for x
    x = 4,834.71/60.72
  6. Step 6: Final answer
    x = 79.62

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.