Home / 137,786.86-190,133.47-80,431.16

Finding the Fourth Proportional to 137,786.86, 190,133.47 and 80,431.16

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Solution

The fourth proportional to 137,786.86, 190,133.47 and 80,431.16 is: 110,987.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,786.86 : 190,133.47 = 80,431.16 : x
  2. Step 2: Convert to fraction form
    137,786.86/190,133.47 = 80,431.16/x
  3. Step 3: Cross multiply
    137,786.86x = 190,133.47 × 80,431.16
  4. Step 4: Simplify right side
    137,786.86x = 15,292,655,546.93
  5. Step 5: Solve for x
    x = 15,292,655,546.93/137,786.86
  6. Step 6: Final answer
    x = 110,987.76

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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.