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Finding the Fourth Proportional to 60,920.64, 91,388.52 and 21,469.86

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Solution

The fourth proportional to 60,920.64, 91,388.52 and 21,469.86 is: 32,207.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,920.64 : 91,388.52 = 21,469.86 : x
  2. Step 2: Convert to fraction form
    60,920.64/91,388.52 = 21,469.86/x
  3. Step 3: Cross multiply
    60,920.64x = 91,388.52 × 21,469.86
  4. Step 4: Simplify right side
    60,920.64x = 1,962,098,730.01
  5. Step 5: Solve for x
    x = 1,962,098,730.01/60,920.64
  6. Step 6: Final answer
    x = 32,207.45

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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.