Home / 138,403.56-190,917.36-87,398.16

Finding the Fourth Proportional to 138,403.56, 190,917.36 and 87,398.16

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Solution

The fourth proportional to 138,403.56, 190,917.36 and 87,398.16 is: 120,559.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,403.56 : 190,917.36 = 87,398.16 : x
  2. Step 2: Convert to fraction form
    138,403.56/190,917.36 = 87,398.16/x
  3. Step 3: Cross multiply
    138,403.56x = 190,917.36 × 87,398.16
  4. Step 4: Simplify right side
    138,403.56x = 16,685,825,976.06
  5. Step 5: Solve for x
    x = 16,685,825,976.06/138,403.56
  6. Step 6: Final answer
    x = 120,559.23

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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.