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Finding the Fourth Proportional to 43,700.61, 65,550.99 and 18,724.47

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Solution

The fourth proportional to 43,700.61, 65,550.99 and 18,724.47 is: 28,086.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,700.61 : 65,550.99 = 18,724.47 : x
  2. Step 2: Convert to fraction form
    43,700.61/65,550.99 = 18,724.47/x
  3. Step 3: Cross multiply
    43,700.61x = 65,550.99 × 18,724.47
  4. Step 4: Simplify right side
    43,700.61x = 1,227,407,545.73
  5. Step 5: Solve for x
    x = 1,227,407,545.73/43,700.61
  6. Step 6: Final answer
    x = 28,086.74

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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.