Home / 121,933.89-168,275.30-68,215.70

Finding the Fourth Proportional to 121,933.89, 168,275.30 and 68,215.70

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Solution

The fourth proportional to 121,933.89, 168,275.30 and 68,215.70 is: 94,141.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,933.89 : 168,275.30 = 68,215.70 : x
  2. Step 2: Convert to fraction form
    121,933.89/168,275.30 = 68,215.70/x
  3. Step 3: Cross multiply
    121,933.89x = 168,275.30 × 68,215.70
  4. Step 4: Simplify right side
    121,933.89x = 11,479,016,199.76
  5. Step 5: Solve for x
    x = 11,479,016,199.76/121,933.89
  6. Step 6: Final answer
    x = 94,141.31

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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.