Home / 121,128.20-167,155.70-67,412.36

Finding the Fourth Proportional to 121,128.20, 167,155.70 and 67,412.36

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Solution

The fourth proportional to 121,128.20, 167,155.70 and 67,412.36 is: 93,028.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,128.20 : 167,155.70 = 67,412.36 : x
  2. Step 2: Convert to fraction form
    121,128.20/167,155.70 = 67,412.36/x
  3. Step 3: Cross multiply
    121,128.20x = 167,155.70 × 67,412.36
  4. Step 4: Simplify right side
    121,128.20x = 11,268,360,224.45
  5. Step 5: Solve for x
    x = 11,268,360,224.45/121,128.20
  6. Step 6: Final answer
    x = 93,028.38

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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.