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Finding the Fourth Proportional to 239,780.80, 330,905.52 and 130,891.60

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Solution

The fourth proportional to 239,780.80, 330,905.52 and 130,891.60 is: 180,634.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,780.80 : 330,905.52 = 130,891.60 : x
  2. Step 2: Convert to fraction form
    239,780.80/330,905.52 = 130,891.60/x
  3. Step 3: Cross multiply
    239,780.80x = 330,905.52 × 130,891.60
  4. Step 4: Simplify right side
    239,780.80x = 43,312,752,961.63
  5. Step 5: Solve for x
    x = 43,312,752,961.63/239,780.80
  6. Step 6: Final answer
    x = 180,634.78

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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.