Home / 121,612.05-167,776.38-81,261.90

Finding the Fourth Proportional to 121,612.05, 167,776.38 and 81,261.90

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Solution

The fourth proportional to 121,612.05, 167,776.38 and 81,261.90 is: 112,109.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,612.05 : 167,776.38 = 81,261.90 : x
  2. Step 2: Convert to fraction form
    121,612.05/167,776.38 = 81,261.90/x
  3. Step 3: Cross multiply
    121,612.05x = 167,776.38 × 81,261.90
  4. Step 4: Simplify right side
    121,612.05x = 13,633,827,413.92
  5. Step 5: Solve for x
    x = 13,633,827,413.92/121,612.05
  6. Step 6: Final answer
    x = 112,109.18

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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.