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Finding the Fourth Proportional to 45,387.80, 68,000.70 and 21,962.60

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Solution

The fourth proportional to 45,387.80, 68,000.70 and 21,962.60 is: 32,904.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,387.80 : 68,000.70 = 21,962.60 : x
  2. Step 2: Convert to fraction form
    45,387.80/68,000.70 = 21,962.60/x
  3. Step 3: Cross multiply
    45,387.80x = 68,000.70 × 21,962.60
  4. Step 4: Simplify right side
    45,387.80x = 1,493,472,173.82
  5. Step 5: Solve for x
    x = 1,493,472,173.82/45,387.80
  6. Step 6: Final answer
    x = 32,904.71

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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.