Home / 85,720.40-128,481.24-50,689.52

Finding the Fourth Proportional to 85,720.40, 128,481.24 and 50,689.52

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Solution

The fourth proportional to 85,720.40, 128,481.24 and 50,689.52 is: 75,975.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,720.40 : 128,481.24 = 50,689.52 : x
  2. Step 2: Convert to fraction form
    85,720.40/128,481.24 = 50,689.52/x
  3. Step 3: Cross multiply
    85,720.40x = 128,481.24 × 50,689.52
  4. Step 4: Simplify right side
    85,720.40x = 6,512,652,384.60
  5. Step 5: Solve for x
    x = 6,512,652,384.60/85,720.40
  6. Step 6: Final answer
    x = 75,975.52

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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.