Home / 121,828.81-168,127.33-67,382.60

Finding the Fourth Proportional to 121,828.81, 168,127.33 and 67,382.60

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Solution

The fourth proportional to 121,828.81, 168,127.33 and 67,382.60 is: 92,989.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,828.81 : 168,127.33 = 67,382.60 : x
  2. Step 2: Convert to fraction form
    121,828.81/168,127.33 = 67,382.60/x
  3. Step 3: Cross multiply
    121,828.81x = 168,127.33 × 67,382.60
  4. Step 4: Simplify right side
    121,828.81x = 11,328,856,689.42
  5. Step 5: Solve for x
    x = 11,328,856,689.42/121,828.81
  6. Step 6: Final answer
    x = 92,989.96

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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.