Home / 121,782.12-168,067.20-68,069.40

Finding the Fourth Proportional to 121,782.12, 168,067.20 and 68,069.40

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Solution

The fourth proportional to 121,782.12, 168,067.20 and 68,069.40 is: 93,940.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,782.12 : 168,067.20 = 68,069.40 : x
  2. Step 2: Convert to fraction form
    121,782.12/168,067.20 = 68,069.40/x
  3. Step 3: Cross multiply
    121,782.12x = 168,067.20 × 68,069.40
  4. Step 4: Simplify right side
    121,782.12x = 11,440,233,463.68
  5. Step 5: Solve for x
    x = 11,440,233,463.68/121,782.12
  6. Step 6: Final answer
    x = 93,940.17

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1.5x scale

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.