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Finding the Fourth Proportional to 61,170.86, 91,765.41 and 21,724.66

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Solution

The fourth proportional to 61,170.86, 91,765.41 and 21,724.66 is: 32,590.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,170.86 : 91,765.41 = 21,724.66 : x
  2. Step 2: Convert to fraction form
    61,170.86/91,765.41 = 21,724.66/x
  3. Step 3: Cross multiply
    61,170.86x = 91,765.41 × 21,724.66
  4. Step 4: Simplify right side
    61,170.86x = 1,993,572,332.01
  5. Step 5: Solve for x
    x = 1,993,572,332.01/61,170.86
  6. Step 6: Final answer
    x = 32,590.23

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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.