Home / 121,138.26-167,099.94-78,725.04

Finding the Fourth Proportional to 121,138.26, 167,099.94 and 78,725.04

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Solution

The fourth proportional to 121,138.26, 167,099.94 and 78,725.04 is: 108,594.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,138.26 : 167,099.94 = 78,725.04 : x
  2. Step 2: Convert to fraction form
    121,138.26/167,099.94 = 78,725.04/x
  3. Step 3: Cross multiply
    121,138.26x = 167,099.94 × 78,725.04
  4. Step 4: Simplify right side
    121,138.26x = 13,154,949,460.50
  5. Step 5: Solve for x
    x = 13,154,949,460.50/121,138.26
  6. Step 6: Final answer
    x = 108,594.51

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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.