Home / 121,440.43-167,530.60-78,983.47

Finding the Fourth Proportional to 121,440.43, 167,530.60 and 78,983.47

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Solution

The fourth proportional to 121,440.43, 167,530.60 and 78,983.47 is: 108,959.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,440.43 : 167,530.60 = 78,983.47 : x
  2. Step 2: Convert to fraction form
    121,440.43/167,530.60 = 78,983.47/x
  3. Step 3: Cross multiply
    121,440.43x = 167,530.60 × 78,983.47
  4. Step 4: Simplify right side
    121,440.43x = 13,232,147,724.26
  5. Step 5: Solve for x
    x = 13,232,147,724.26/121,440.43
  6. Step 6: Final answer
    x = 108,959.99

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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.