Home / 85,118.32-117,481.08-51,128.38

Finding the Fourth Proportional to 85,118.32, 117,481.08 and 51,128.38

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Solution

The fourth proportional to 85,118.32, 117,481.08 and 51,128.38 is: 70,567.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,118.32 : 117,481.08 = 51,128.38 : x
  2. Step 2: Convert to fraction form
    85,118.32/117,481.08 = 51,128.38/x
  3. Step 3: Cross multiply
    85,118.32x = 117,481.08 × 51,128.38
  4. Step 4: Simplify right side
    85,118.32x = 6,006,617,301.05
  5. Step 5: Solve for x
    x = 6,006,617,301.05/85,118.32
  6. Step 6: Final answer
    x = 70,567.86

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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.