Home / 121,982.19-168,411.83-78,392.41

Finding the Fourth Proportional to 121,982.19, 168,411.83 and 78,392.41

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Solution

The fourth proportional to 121,982.19, 168,411.83 and 78,392.41 is: 108,230.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,982.19 : 168,411.83 = 78,392.41 : x
  2. Step 2: Convert to fraction form
    121,982.19/168,411.83 = 78,392.41/x
  3. Step 3: Cross multiply
    121,982.19x = 168,411.83 × 78,392.41
  4. Step 4: Simplify right side
    121,982.19x = 13,202,209,226.21
  5. Step 5: Solve for x
    x = 13,202,209,226.21/121,982.19
  6. Step 6: Final answer
    x = 108,230.63

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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.