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Finding the Fourth Proportional to 239,969.68, 359,731.96 and 90,309.22

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Solution

The fourth proportional to 239,969.68, 359,731.96 and 90,309.22 is: 135,380.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,969.68 : 359,731.96 = 90,309.22 : x
  2. Step 2: Convert to fraction form
    239,969.68/359,731.96 = 90,309.22/x
  3. Step 3: Cross multiply
    239,969.68x = 359,731.96 × 90,309.22
  4. Step 4: Simplify right side
    239,969.68x = 32,487,112,716.67
  5. Step 5: Solve for x
    x = 32,487,112,716.67/239,969.68
  6. Step 6: Final answer
    x = 135,380.07

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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.