Home / 138,149,947.73-190,732,966.92-87,942,495.21

Finding the Fourth Proportional to 138,149,947.73, 190,732,966.92 and 87,942,495.21

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Solution

The fourth proportional to 138,149,947.73, 190,732,966.92 and 87,942,495.21 is: 121,415,413.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,149,947.73 : 190,732,966.92 = 87,942,495.21 : x
  2. Step 2: Convert to fraction form
    138,149,947.73/190,732,966.92 = 87,942,495.21/x
  3. Step 3: Cross multiply
    138,149,947.73x = 190,732,966.92 × 87,942,495.21
  4. Step 4: Simplify right side
    138,149,947.73x = 16,773,533,029,751,186
  5. Step 5: Solve for x
    x = 16,773,533,029,751,186/138,149,947.73
  6. Step 6: Final answer
    x = 121,415,413.51

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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.