Home / 138,314.63-190,872.26-77,891.16

Finding the Fourth Proportional to 138,314.63, 190,872.26 and 77,891.16

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Solution

The fourth proportional to 138,314.63, 190,872.26 and 77,891.16 is: 107,488.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,314.63 : 190,872.26 = 77,891.16 : x
  2. Step 2: Convert to fraction form
    138,314.63/190,872.26 = 77,891.16/x
  3. Step 3: Cross multiply
    138,314.63x = 190,872.26 × 77,891.16
  4. Step 4: Simplify right side
    138,314.63x = 14,867,261,743.22
  5. Step 5: Solve for x
    x = 14,867,261,743.22/138,314.63
  6. Step 6: Final answer
    x = 107,488.71

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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.