Home / 126,672.48-174,798-78,979.68

Finding the Fourth Proportional to 126,672.48, 174,798 and 78,979.68

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Solution

The fourth proportional to 126,672.48, 174,798 and 78,979.68 is: 108,985.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,672.48 : 174,798 = 78,979.68 : x
  2. Step 2: Convert to fraction form
    126,672.48/174,798 = 78,979.68/x
  3. Step 3: Cross multiply
    126,672.48x = 174,798 × 78,979.68
  4. Step 4: Simplify right side
    126,672.48x = 13,805,490,104.64
  5. Step 5: Solve for x
    x = 13,805,490,104.64/126,672.48
  6. Step 6: Final answer
    x = 108,985.71

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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.