Home / 239,947.20-331,146.72-138,005.68

Finding the Fourth Proportional to 239,947.20, 331,146.72 and 138,005.68

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Solution

The fourth proportional to 239,947.20, 331,146.72 and 138,005.68 is: 190,459.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,947.20 : 331,146.72 = 138,005.68 : x
  2. Step 2: Convert to fraction form
    239,947.20/331,146.72 = 138,005.68/x
  3. Step 3: Cross multiply
    239,947.20x = 331,146.72 × 138,005.68
  4. Step 4: Simplify right side
    239,947.20x = 45,700,128,273.37
  5. Step 5: Solve for x
    x = 45,700,128,273.37/239,947.20
  6. Step 6: Final answer
    x = 190,459.10

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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.