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Finding the Fourth Proportional to 61.79, 85.25 and 41.07

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Solution

The fourth proportional to 61.79, 85.25 and 41.07 is: 56.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.79 : 85.25 = 41.07 : x
  2. Step 2: Convert to fraction form
    61.79/85.25 = 41.07/x
  3. Step 3: Cross multiply
    61.79x = 85.25 × 41.07
  4. Step 4: Simplify right side
    61.79x = 3,501.22
  5. Step 5: Solve for x
    x = 3,501.22/61.79
  6. Step 6: Final answer
    x = 56.66

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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.