Home / 126,243.88-174,279.69-78,512.61

Finding the Fourth Proportional to 126,243.88, 174,279.69 and 78,512.61

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Solution

The fourth proportional to 126,243.88, 174,279.69 and 78,512.61 is: 108,386.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,243.88 : 174,279.69 = 78,512.61 : x
  2. Step 2: Convert to fraction form
    126,243.88/174,279.69 = 78,512.61/x
  3. Step 3: Cross multiply
    126,243.88x = 174,279.69 × 78,512.61
  4. Step 4: Simplify right side
    126,243.88x = 13,683,153,331.89
  5. Step 5: Solve for x
    x = 13,683,153,331.89/126,243.88
  6. Step 6: Final answer
    x = 108,386.67

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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.