Home / 138,822.56-208,023.60-91,907.36

Finding the Fourth Proportional to 138,822.56, 208,023.60 and 91,907.36

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Solution

The fourth proportional to 138,822.56, 208,023.60 and 91,907.36 is: 137,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,822.56 : 208,023.60 = 91,907.36 : x
  2. Step 2: Convert to fraction form
    138,822.56/208,023.60 = 91,907.36/x
  3. Step 3: Cross multiply
    138,822.56x = 208,023.60 × 91,907.36
  4. Step 4: Simplify right side
    138,822.56x = 19,118,899,893.70
  5. Step 5: Solve for x
    x = 19,118,899,893.70/138,822.56
  6. Step 6: Final answer
    x = 137,721.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.