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Finding the Fourth Proportional to 68,591.88, 103,060.08 and 43,642.80

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Solution

The fourth proportional to 68,591.88, 103,060.08 and 43,642.80 is: 65,573.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,591.88 : 103,060.08 = 43,642.80 : x
  2. Step 2: Convert to fraction form
    68,591.88/103,060.08 = 43,642.80/x
  3. Step 3: Cross multiply
    68,591.88x = 103,060.08 × 43,642.80
  4. Step 4: Simplify right side
    68,591.88x = 4,497,830,459.42
  5. Step 5: Solve for x
    x = 4,497,830,459.42/68,591.88
  6. Step 6: Final answer
    x = 65,573.80

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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.