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Finding the Fourth Proportional to 43,362.87, 64,921.31 and 28,387.45

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Solution

The fourth proportional to 43,362.87, 64,921.31 and 28,387.45 is: 42,500.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,362.87 : 64,921.31 = 28,387.45 : x
  2. Step 2: Convert to fraction form
    43,362.87/64,921.31 = 28,387.45/x
  3. Step 3: Cross multiply
    43,362.87x = 64,921.31 × 28,387.45
  4. Step 4: Simplify right side
    43,362.87x = 1,842,950,441.56
  5. Step 5: Solve for x
    x = 1,842,950,441.56/43,362.87
  6. Step 6: Final answer
    x = 42,500.66

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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.