Home / 138,149,965.38-190,732,991.31-87,942,512.88

Finding the Fourth Proportional to 138,149,965.38, 190,732,991.31 and 87,942,512.88

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Solution

The fourth proportional to 138,149,965.38, 190,732,991.31 and 87,942,512.88 is: 121,415,437.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,149,965.38 : 190,732,991.31 = 87,942,512.88 : x
  2. Step 2: Convert to fraction form
    138,149,965.38/190,732,991.31 = 87,942,512.88/x
  3. Step 3: Cross multiply
    138,149,965.38x = 190,732,991.31 × 87,942,512.88
  4. Step 4: Simplify right side
    138,149,965.38x = 16,773,538,544,920,602
  5. Step 5: Solve for x
    x = 16,773,538,544,920,602/138,149,965.38
  6. Step 6: Final answer
    x = 121,415,437.92

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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.