Home / 138,149,964.38-190,732,989.93-87,942,511.88

Finding the Fourth Proportional to 138,149,964.38, 190,732,989.93 and 87,942,511.88

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Solution

The fourth proportional to 138,149,964.38, 190,732,989.93 and 87,942,511.88 is: 121,415,436.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,149,964.38 : 190,732,989.93 = 87,942,511.88 : x
  2. Step 2: Convert to fraction form
    138,149,964.38/190,732,989.93 = 87,942,511.88/x
  3. Step 3: Cross multiply
    138,149,964.38x = 190,732,989.93 × 87,942,511.88
  4. Step 4: Simplify right side
    138,149,964.38x = 16,773,538,231,873,282
  5. Step 5: Solve for x
    x = 16,773,538,231,873,282/138,149,964.38
  6. Step 6: Final answer
    x = 121,415,436.53

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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.