Home / 138,190.30-190,728.73-86,531.39

Finding the Fourth Proportional to 138,190.30, 190,728.73 and 86,531.39

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Solution

The fourth proportional to 138,190.30, 190,728.73 and 86,531.39 is: 119,429.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,190.30 : 190,728.73 = 86,531.39 : x
  2. Step 2: Convert to fraction form
    138,190.30/190,728.73 = 86,531.39/x
  3. Step 3: Cross multiply
    138,190.30x = 190,728.73 × 86,531.39
  4. Step 4: Simplify right side
    138,190.30x = 16,504,021,502.85
  5. Step 5: Solve for x
    x = 16,504,021,502.85/138,190.30
  6. Step 6: Final answer
    x = 119,429.66

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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.