Home / 239,922.72-331,104-137,981.28

Finding the Fourth Proportional to 239,922.72, 331,104 and 137,981.28

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Solution

The fourth proportional to 239,922.72, 331,104 and 137,981.28 is: 190,420.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,922.72 : 331,104 = 137,981.28 : x
  2. Step 2: Convert to fraction form
    239,922.72/331,104 = 137,981.28/x
  3. Step 3: Cross multiply
    239,922.72x = 331,104 × 137,981.28
  4. Step 4: Simplify right side
    239,922.72x = 45,686,153,733.12
  5. Step 5: Solve for x
    x = 45,686,153,733.12/239,922.72
  6. Step 6: Final answer
    x = 190,420.29

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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.