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Finding the Fourth Proportional to 240,356.87, 331,655.63 and 138,362.61

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Solution

The fourth proportional to 240,356.87, 331,655.63 and 138,362.61 is: 190,919.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,356.87 : 331,655.63 = 138,362.61 : x
  2. Step 2: Convert to fraction form
    240,356.87/331,655.63 = 138,362.61/x
  3. Step 3: Cross multiply
    240,356.87x = 331,655.63 × 138,362.61
  4. Step 4: Simplify right side
    240,356.87x = 45,888,737,896.18
  5. Step 5: Solve for x
    x = 45,888,737,896.18/240,356.87
  6. Step 6: Final answer
    x = 190,919.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.