Home / 121,785.10-168,115.26-74,053.78

Finding the Fourth Proportional to 121,785.10, 168,115.26 and 74,053.78

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Solution

The fourth proportional to 121,785.10, 168,115.26 and 74,053.78 is: 102,225.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,785.10 : 168,115.26 = 74,053.78 : x
  2. Step 2: Convert to fraction form
    121,785.10/168,115.26 = 74,053.78/x
  3. Step 3: Cross multiply
    121,785.10x = 168,115.26 × 74,053.78
  4. Step 4: Simplify right side
    121,785.10x = 12,449,570,478.68
  5. Step 5: Solve for x
    x = 12,449,570,478.68/121,785.10
  6. Step 6: Final answer
    x = 102,225.73

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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.