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Finding the Fourth Proportional to 60,921.64, 91,390.02 and 21,470.86

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Solution

The fourth proportional to 60,921.64, 91,390.02 and 21,470.86 is: 32,208.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,921.64 : 91,390.02 = 21,470.86 : x
  2. Step 2: Convert to fraction form
    60,921.64/91,390.02 = 21,470.86/x
  3. Step 3: Cross multiply
    60,921.64x = 91,390.02 × 21,470.86
  4. Step 4: Simplify right side
    60,921.64x = 1,962,222,324.82
  5. Step 5: Solve for x
    x = 1,962,222,324.82/60,921.64
  6. Step 6: Final answer
    x = 32,208.95

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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.