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Finding the Fourth Proportional to 239,763.38, 330,921.87 and 137,860.13

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Solution

The fourth proportional to 239,763.38, 330,921.87 and 137,860.13 is: 190,274.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,763.38 : 330,921.87 = 137,860.13 : x
  2. Step 2: Convert to fraction form
    239,763.38/330,921.87 = 137,860.13/x
  3. Step 3: Cross multiply
    239,763.38x = 330,921.87 × 137,860.13
  4. Step 4: Simplify right side
    239,763.38x = 45,620,932,018.04
  5. Step 5: Solve for x
    x = 45,620,932,018.04/239,763.38
  6. Step 6: Final answer
    x = 190,274.81

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1.5x scale

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.