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Finding the Fourth Proportional to 60.21, 83.07 and 57.08

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Solution

The fourth proportional to 60.21, 83.07 and 57.08 is: 78.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.21 : 83.07 = 57.08 : x
  2. Step 2: Convert to fraction form
    60.21/83.07 = 57.08/x
  3. Step 3: Cross multiply
    60.21x = 83.07 × 57.08
  4. Step 4: Simplify right side
    60.21x = 4,741.22
  5. Step 5: Solve for x
    x = 4,741.22/60.21
  6. Step 6: Final answer
    x = 78.74

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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.