Home / 138,249.72-190,785.04-77,821.29

Finding the Fourth Proportional to 138,249.72, 190,785.04 and 77,821.29

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Solution

The fourth proportional to 138,249.72, 190,785.04 and 77,821.29 is: 107,393.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,249.72 : 190,785.04 = 77,821.29 : x
  2. Step 2: Convert to fraction form
    138,249.72/190,785.04 = 77,821.29/x
  3. Step 3: Cross multiply
    138,249.72x = 190,785.04 × 77,821.29
  4. Step 4: Simplify right side
    138,249.72x = 14,847,137,730.95
  5. Step 5: Solve for x
    x = 14,847,137,730.95/138,249.72
  6. Step 6: Final answer
    x = 107,393.62

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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.