Home / 121,415.06-167,579.62-78,899.78

Finding the Fourth Proportional to 121,415.06, 167,579.62 and 78,899.78

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Solution

The fourth proportional to 121,415.06, 167,579.62 and 78,899.78 is: 108,899.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,415.06 : 167,579.62 = 78,899.78 : x
  2. Step 2: Convert to fraction form
    121,415.06/167,579.62 = 78,899.78/x
  3. Step 3: Cross multiply
    121,415.06x = 167,579.62 × 78,899.78
  4. Step 4: Simplify right side
    121,415.06x = 13,221,995,150.48
  5. Step 5: Solve for x
    x = 13,221,995,150.48/121,415.06
  6. Step 6: Final answer
    x = 108,899.14

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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.