Home / 138,342.39-190,840.26-87,336.75

Finding the Fourth Proportional to 138,342.39, 190,840.26 and 87,336.75

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Solution

The fourth proportional to 138,342.39, 190,840.26 and 87,336.75 is: 120,479.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,342.39 : 190,840.26 = 87,336.75 : x
  2. Step 2: Convert to fraction form
    138,342.39/190,840.26 = 87,336.75/x
  3. Step 3: Cross multiply
    138,342.39x = 190,840.26 × 87,336.75
  4. Step 4: Simplify right side
    138,342.39x = 16,667,368,077.56
  5. Step 5: Solve for x
    x = 16,667,368,077.56/138,342.39
  6. Step 6: Final answer
    x = 120,479.11

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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.