Home / 121,811.28-168,100.77-68,099.24

Finding the Fourth Proportional to 121,811.28, 168,100.77 and 68,099.24

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Solution

The fourth proportional to 121,811.28, 168,100.77 and 68,099.24 is: 93,977.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,811.28 : 168,100.77 = 68,099.24 : x
  2. Step 2: Convert to fraction form
    121,811.28/168,100.77 = 68,099.24/x
  3. Step 3: Cross multiply
    121,811.28x = 168,100.77 × 68,099.24
  4. Step 4: Simplify right side
    121,811.28x = 11,447,534,680.41
  5. Step 5: Solve for x
    x = 11,447,534,680.41/121,811.28
  6. Step 6: Final answer
    x = 93,977.62

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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.