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Finding the Fourth Proportional to 43,700.64, 65,551.02 and 18,724.50

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Solution

The fourth proportional to 43,700.64, 65,551.02 and 18,724.50 is: 28,086.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,700.64 : 65,551.02 = 18,724.50 : x
  2. Step 2: Convert to fraction form
    43,700.64/65,551.02 = 18,724.50/x
  3. Step 3: Cross multiply
    43,700.64x = 65,551.02 × 18,724.50
  4. Step 4: Simplify right side
    43,700.64x = 1,227,410,073.99
  5. Step 5: Solve for x
    x = 1,227,410,073.99/43,700.64
  6. Step 6: Final answer
    x = 28,086.78

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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.