Home / 85,240.32-127,872.64-40,889.28

Finding the Fourth Proportional to 85,240.32, 127,872.64 and 40,889.28

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Solution

The fourth proportional to 85,240.32, 127,872.64 and 40,889.28 is: 61,339.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,240.32 : 127,872.64 = 40,889.28 : x
  2. Step 2: Convert to fraction form
    85,240.32/127,872.64 = 40,889.28/x
  3. Step 3: Cross multiply
    85,240.32x = 127,872.64 × 40,889.28
  4. Step 4: Simplify right side
    85,240.32x = 5,228,620,181.30
  5. Step 5: Solve for x
    x = 5,228,620,181.30/85,240.32
  6. Step 6: Final answer
    x = 61,339.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.