Home / 258,693,207.20-388,039,810.80-129,320,784.80

Finding the Fourth Proportional to 258,693,207.20, 388,039,810.80 and 129,320,784.80

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Solution

The fourth proportional to 258,693,207.20, 388,039,810.80 and 129,320,784.80 is: 193,981,177.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,693,207.20 : 388,039,810.80 = 129,320,784.80 : x
  2. Step 2: Convert to fraction form
    258,693,207.20/388,039,810.80 = 129,320,784.80/x
  3. Step 3: Cross multiply
    258,693,207.20x = 388,039,810.80 × 129,320,784.80
  4. Step 4: Simplify right side
    258,693,207.20x = 50,181,612,866,299,520
  5. Step 5: Solve for x
    x = 50,181,612,866,299,520/258,693,207.20
  6. Step 6: Final answer
    x = 193,981,177.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.