Home / 100,431.41-138,590.69-55,108.26

Finding the Fourth Proportional to 100,431.41, 138,590.69 and 55,108.26

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Solution

The fourth proportional to 100,431.41, 138,590.69 and 55,108.26 is: 76,046.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,431.41 : 138,590.69 = 55,108.26 : x
  2. Step 2: Convert to fraction form
    100,431.41/138,590.69 = 55,108.26/x
  3. Step 3: Cross multiply
    100,431.41x = 138,590.69 × 55,108.26
  4. Step 4: Simplify right side
    100,431.41x = 7,637,491,502.56
  5. Step 5: Solve for x
    x = 7,637,491,502.56/100,431.41
  6. Step 6: Final answer
    x = 76,046.85

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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.