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Finding the Fourth Proportional to 60,897.72, 91,344.51 and 21,453.80

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Solution

The fourth proportional to 60,897.72, 91,344.51 and 21,453.80 is: 32,179.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,897.72 : 91,344.51 = 21,453.80 : x
  2. Step 2: Convert to fraction form
    60,897.72/91,344.51 = 21,453.80/x
  3. Step 3: Cross multiply
    60,897.72x = 91,344.51 × 21,453.80
  4. Step 4: Simplify right side
    60,897.72x = 1,959,686,391.92
  5. Step 5: Solve for x
    x = 1,959,686,391.92/60,897.72
  6. Step 6: Final answer
    x = 32,179.96

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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.