Home / 138,393.74-190,943.84-77,943.23

Finding the Fourth Proportional to 138,393.74, 190,943.84 and 77,943.23

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Solution

The fourth proportional to 138,393.74, 190,943.84 and 77,943.23 is: 107,539.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,393.74 : 190,943.84 = 77,943.23 : x
  2. Step 2: Convert to fraction form
    138,393.74/190,943.84 = 77,943.23/x
  3. Step 3: Cross multiply
    138,393.74x = 190,943.84 × 77,943.23
  4. Step 4: Simplify right side
    138,393.74x = 14,882,780,310.42
  5. Step 5: Solve for x
    x = 14,882,780,310.42/138,393.74
  6. Step 6: Final answer
    x = 107,539.41

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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.