Home / 138,153.06-190,634.31-87,146.64

Finding the Fourth Proportional to 138,153.06, 190,634.31 and 87,146.64

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Solution

The fourth proportional to 138,153.06, 190,634.31 and 87,146.64 is: 120,251.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,153.06 : 190,634.31 = 87,146.64 : x
  2. Step 2: Convert to fraction form
    138,153.06/190,634.31 = 87,146.64/x
  3. Step 3: Cross multiply
    138,153.06x = 190,634.31 × 87,146.64
  4. Step 4: Simplify right side
    138,153.06x = 16,613,139,585.22
  5. Step 5: Solve for x
    x = 16,613,139,585.22/138,153.06
  6. Step 6: Final answer
    x = 120,251.69

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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.