Home / 138,197.12-190,709.80-77,767.73

Finding the Fourth Proportional to 138,197.12, 190,709.80 and 77,767.73

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Solution

The fourth proportional to 138,197.12, 190,709.80 and 77,767.73 is: 107,318.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,197.12 : 190,709.80 = 77,767.73 : x
  2. Step 2: Convert to fraction form
    138,197.12/190,709.80 = 77,767.73/x
  3. Step 3: Cross multiply
    138,197.12x = 190,709.80 × 77,767.73
  4. Step 4: Simplify right side
    138,197.12x = 14,831,067,845.92
  5. Step 5: Solve for x
    x = 14,831,067,845.92/138,197.12
  6. Step 6: Final answer
    x = 107,318.21

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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.