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Finding the Fourth Proportional to 43,329.80, 64,921.80 and 40,705.40

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Solution

The fourth proportional to 43,329.80, 64,921.80 and 40,705.40 is: 60,989.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,329.80 : 64,921.80 = 40,705.40 : x
  2. Step 2: Convert to fraction form
    43,329.80/64,921.80 = 40,705.40/x
  3. Step 3: Cross multiply
    43,329.80x = 64,921.80 × 40,705.40
  4. Step 4: Simplify right side
    43,329.80x = 2,642,667,837.72
  5. Step 5: Solve for x
    x = 2,642,667,837.72/43,329.80
  6. Step 6: Final answer
    x = 60,989.62

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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.