Home / 138,149,964.88-190,732,990.62-87,942,512.38

Finding the Fourth Proportional to 138,149,964.88, 190,732,990.62 and 87,942,512.38

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Solution

The fourth proportional to 138,149,964.88, 190,732,990.62 and 87,942,512.38 is: 121,415,437.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,149,964.88 : 190,732,990.62 = 87,942,512.38 : x
  2. Step 2: Convert to fraction form
    138,149,964.88/190,732,990.62 = 87,942,512.38/x
  3. Step 3: Cross multiply
    138,149,964.88x = 190,732,990.62 × 87,942,512.38
  4. Step 4: Simplify right side
    138,149,964.88x = 16,773,538,387,920,110
  5. Step 5: Solve for x
    x = 16,773,538,387,920,110/138,149,964.88
  6. Step 6: Final answer
    x = 121,415,437.23

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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.