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Finding the Fourth Proportional to 45,687.60, 68,531.40 and 43,719.30

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Solution

The fourth proportional to 45,687.60, 68,531.40 and 43,719.30 is: 65,578.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,687.60 : 68,531.40 = 43,719.30 : x
  2. Step 2: Convert to fraction form
    45,687.60/68,531.40 = 43,719.30/x
  3. Step 3: Cross multiply
    45,687.60x = 68,531.40 × 43,719.30
  4. Step 4: Simplify right side
    45,687.60x = 2,996,144,836.02
  5. Step 5: Solve for x
    x = 2,996,144,836.02/45,687.60
  6. Step 6: Final answer
    x = 65,578.95

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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.