Home / 138,375.34-190,936.88-77,942.16

Finding the Fourth Proportional to 138,375.34, 190,936.88 and 77,942.16

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Solution

The fourth proportional to 138,375.34, 190,936.88 and 77,942.16 is: 107,548.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,375.34 : 190,936.88 = 77,942.16 : x
  2. Step 2: Convert to fraction form
    138,375.34/190,936.88 = 77,942.16/x
  3. Step 3: Cross multiply
    138,375.34x = 190,936.88 × 77,942.16
  4. Step 4: Simplify right side
    138,375.34x = 14,882,032,850.86
  5. Step 5: Solve for x
    x = 14,882,032,850.86/138,375.34
  6. Step 6: Final answer
    x = 107,548.30

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1.5x scale

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.