Home / 128,918.52-177,904.79-71,554.49

Finding the Fourth Proportional to 128,918.52, 177,904.79 and 71,554.49

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Solution

The fourth proportional to 128,918.52, 177,904.79 and 71,554.49 is: 98,743.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,918.52 : 177,904.79 = 71,554.49 : x
  2. Step 2: Convert to fraction form
    128,918.52/177,904.79 = 71,554.49/x
  3. Step 3: Cross multiply
    128,918.52x = 177,904.79 × 71,554.49
  4. Step 4: Simplify right side
    128,918.52x = 12,729,887,608.39
  5. Step 5: Solve for x
    x = 12,729,887,608.39/128,918.52
  6. Step 6: Final answer
    x = 98,743.67

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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.