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Finding the Fourth Proportional to 61.86, 93.06 and 61.29

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Solution

The fourth proportional to 61.86, 93.06 and 61.29 is: 92.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.86 : 93.06 = 61.29 : x
  2. Step 2: Convert to fraction form
    61.86/93.06 = 61.29/x
  3. Step 3: Cross multiply
    61.86x = 93.06 × 61.29
  4. Step 4: Simplify right side
    61.86x = 5,703.65
  5. Step 5: Solve for x
    x = 5,703.65/61.86
  6. Step 6: Final answer
    x = 92.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.