Home / 639,725,380.80-959,588,081.28-155,051,188.80

Finding the Fourth Proportional to 639,725,380.80, 959,588,081.28 and 155,051,188.80

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Solution

The fourth proportional to 639,725,380.80, 959,588,081.28 and 155,051,188.80 is: 232,576,785.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,725,380.80 : 959,588,081.28 = 155,051,188.80 : x
  2. Step 2: Convert to fraction form
    639,725,380.80/959,588,081.28 = 155,051,188.80/x
  3. Step 3: Cross multiply
    639,725,380.80x = 959,588,081.28 × 155,051,188.80
  4. Step 4: Simplify right side
    639,725,380.80x = 148,785,272,760,775,040
  5. Step 5: Solve for x
    x = 148,785,272,760,775,040/639,725,380.80
  6. Step 6: Final answer
    x = 232,576,785.64

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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.