Home / 121,556.84-167,547.66-81,255.90

Finding the Fourth Proportional to 121,556.84, 167,547.66 and 81,255.90

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Solution

The fourth proportional to 121,556.84, 167,547.66 and 81,255.90 is: 111,998.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,556.84 : 167,547.66 = 81,255.90 : x
  2. Step 2: Convert to fraction form
    121,556.84/167,547.66 = 81,255.90/x
  3. Step 3: Cross multiply
    121,556.84x = 167,547.66 × 81,255.90
  4. Step 4: Simplify right side
    121,556.84x = 13,614,234,662.18
  5. Step 5: Solve for x
    x = 13,614,234,662.18/121,556.84
  6. Step 6: Final answer
    x = 111,998.92

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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.