Home / 138,149,940.29-190,732,956.65-87,942,487.75

Finding the Fourth Proportional to 138,149,940.29, 190,732,956.65 and 87,942,487.75

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Solution

The fourth proportional to 138,149,940.29, 190,732,956.65 and 87,942,487.75 is: 121,415,403.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,149,940.29 : 190,732,956.65 = 87,942,487.75 : x
  2. Step 2: Convert to fraction form
    138,149,940.29/190,732,956.65 = 87,942,487.75/x
  3. Step 3: Cross multiply
    138,149,940.29x = 190,732,956.65 × 87,942,487.75
  4. Step 4: Simplify right side
    138,149,940.29x = 16,773,530,703,713,906
  5. Step 5: Solve for x
    x = 16,773,530,703,713,906/138,149,940.29
  6. Step 6: Final answer
    x = 121,415,403.21

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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.