Home / 121,406.46-167,159.66-103,221.42

Finding the Fourth Proportional to 121,406.46, 167,159.66 and 103,221.42

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Solution

The fourth proportional to 121,406.46, 167,159.66 and 103,221.42 is: 142,121.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,406.46 : 167,159.66 = 103,221.42 : x
  2. Step 2: Convert to fraction form
    121,406.46/167,159.66 = 103,221.42/x
  3. Step 3: Cross multiply
    121,406.46x = 167,159.66 × 103,221.42
  4. Step 4: Simplify right side
    121,406.46x = 17,254,456,909.58
  5. Step 5: Solve for x
    x = 17,254,456,909.58/121,406.46
  6. Step 6: Final answer
    x = 142,121.41

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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.