Home / 128,749.14-177,671.97-71,388.57

Finding the Fourth Proportional to 128,749.14, 177,671.97 and 71,388.57

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Solution

The fourth proportional to 128,749.14, 177,671.97 and 71,388.57 is: 98,515.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,749.14 : 177,671.97 = 71,388.57 : x
  2. Step 2: Convert to fraction form
    128,749.14/177,671.97 = 71,388.57/x
  3. Step 3: Cross multiply
    128,749.14x = 177,671.97 × 71,388.57
  4. Step 4: Simplify right side
    128,749.14x = 12,683,747,867.38
  5. Step 5: Solve for x
    x = 12,683,747,867.38/128,749.14
  6. Step 6: Final answer
    x = 98,515.20

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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.