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Finding the Fourth Proportional to 239,215.80, 330,132.72 and 131,785.80

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Solution

The fourth proportional to 239,215.80, 330,132.72 and 131,785.80 is: 181,872.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,215.80 : 330,132.72 = 131,785.80 : x
  2. Step 2: Convert to fraction form
    239,215.80/330,132.72 = 131,785.80/x
  3. Step 3: Cross multiply
    239,215.80x = 330,132.72 × 131,785.80
  4. Step 4: Simplify right side
    239,215.80x = 43,506,804,611.38
  5. Step 5: Solve for x
    x = 43,506,804,611.38/239,215.80
  6. Step 6: Final answer
    x = 181,872.62

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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.