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Finding the Fourth Proportional to 56,839.52, 85,213.00 and 21,280.88

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Solution

The fourth proportional to 56,839.52, 85,213.00 and 21,280.88 is: 31,903.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,839.52 : 85,213.00 = 21,280.88 : x
  2. Step 2: Convert to fraction form
    56,839.52/85,213.00 = 21,280.88/x
  3. Step 3: Cross multiply
    56,839.52x = 85,213.00 × 21,280.88
  4. Step 4: Simplify right side
    56,839.52x = 1,813,407,357.82
  5. Step 5: Solve for x
    x = 1,813,407,357.82/56,839.52
  6. Step 6: Final answer
    x = 31,903.99

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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.