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Finding the Fourth Proportional to 60,906.64, 91,367.34 and 21,455.68

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Solution

The fourth proportional to 60,906.64, 91,367.34 and 21,455.68 is: 32,186.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,906.64 : 91,367.34 = 21,455.68 : x
  2. Step 2: Convert to fraction form
    60,906.64/91,367.34 = 21,455.68/x
  3. Step 3: Cross multiply
    60,906.64x = 91,367.34 × 21,455.68
  4. Step 4: Simplify right side
    60,906.64x = 1,960,348,409.49
  5. Step 5: Solve for x
    x = 1,960,348,409.49/60,906.64
  6. Step 6: Final answer
    x = 32,186.12

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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.