Home / 138,962.32-191,723.72-85,221.52

Finding the Fourth Proportional to 138,962.32, 191,723.72 and 85,221.52

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Solution

The fourth proportional to 138,962.32, 191,723.72 and 85,221.52 is: 117,578.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,962.32 : 191,723.72 = 85,221.52 : x
  2. Step 2: Convert to fraction form
    138,962.32/191,723.72 = 85,221.52/x
  3. Step 3: Cross multiply
    138,962.32x = 191,723.72 × 85,221.52
  4. Step 4: Simplify right side
    138,962.32x = 16,338,986,838.45
  5. Step 5: Solve for x
    x = 16,338,986,838.45/138,962.32
  6. Step 6: Final answer
    x = 117,578.54

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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.