Home / 121,856.90-168,161.37-68,141.30

Finding the Fourth Proportional to 121,856.90, 168,161.37 and 68,141.30

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Solution

The fourth proportional to 121,856.90, 168,161.37 and 68,141.30 is: 94,034.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,856.90 : 168,161.37 = 68,141.30 : x
  2. Step 2: Convert to fraction form
    121,856.90/168,161.37 = 68,141.30/x
  3. Step 3: Cross multiply
    121,856.90x = 168,161.37 × 68,141.30
  4. Step 4: Simplify right side
    121,856.90x = 11,458,734,361.58
  5. Step 5: Solve for x
    x = 11,458,734,361.58/121,856.90
  6. Step 6: Final answer
    x = 94,034.35

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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.