Home / 138,149,942.30-190,732,959.41-87,942,489.77

Finding the Fourth Proportional to 138,149,942.30, 190,732,959.41 and 87,942,489.77

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Solution

The fourth proportional to 138,149,942.30, 190,732,959.41 and 87,942,489.77 is: 121,415,405.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,149,942.30 : 190,732,959.41 = 87,942,489.77 : x
  2. Step 2: Convert to fraction form
    138,149,942.30/190,732,959.41 = 87,942,489.77/x
  3. Step 3: Cross multiply
    138,149,942.30x = 190,732,959.41 × 87,942,489.77
  4. Step 4: Simplify right side
    138,149,942.30x = 16,773,531,330,322,374
  5. Step 5: Solve for x
    x = 16,773,531,330,322,374/138,149,942.30
  6. Step 6: Final answer
    x = 121,415,405.98

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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.