Home / 128,060.36-191,935.01-90,631.37

Finding the Fourth Proportional to 128,060.36, 191,935.01 and 90,631.37

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Solution

The fourth proportional to 128,060.36, 191,935.01 and 90,631.37 is: 135,836.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,060.36 : 191,935.01 = 90,631.37 : x
  2. Step 2: Convert to fraction form
    128,060.36/191,935.01 = 90,631.37/x
  3. Step 3: Cross multiply
    128,060.36x = 191,935.01 × 90,631.37
  4. Step 4: Simplify right side
    128,060.36x = 17,395,332,907.26
  5. Step 5: Solve for x
    x = 17,395,332,907.26/128,060.36
  6. Step 6: Final answer
    x = 135,836.98

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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.