Home / 128,729.25-193,139.24-57,646.08

Finding the Fourth Proportional to 128,729.25, 193,139.24 and 57,646.08

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Solution

The fourth proportional to 128,729.25, 193,139.24 and 57,646.08 is: 86,489.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,729.25 : 193,139.24 = 57,646.08 : x
  2. Step 2: Convert to fraction form
    128,729.25/193,139.24 = 57,646.08/x
  3. Step 3: Cross multiply
    128,729.25x = 193,139.24 × 57,646.08
  4. Step 4: Simplify right side
    128,729.25x = 11,133,719,791.95
  5. Step 5: Solve for x
    x = 11,133,719,791.95/128,729.25
  6. Step 6: Final answer
    x = 86,489.43

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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.