Home / 90,731.78-125,200.34-50,439.06

Finding the Fourth Proportional to 90,731.78, 125,200.34 and 50,439.06

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Solution

The fourth proportional to 90,731.78, 125,200.34 and 50,439.06 is: 69,600.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,731.78 : 125,200.34 = 50,439.06 : x
  2. Step 2: Convert to fraction form
    90,731.78/125,200.34 = 50,439.06/x
  3. Step 3: Cross multiply
    90,731.78x = 125,200.34 × 50,439.06
  4. Step 4: Simplify right side
    90,731.78x = 6,314,987,461.28
  5. Step 5: Solve for x
    x = 6,314,987,461.28/90,731.78
  6. Step 6: Final answer
    x = 69,600.61

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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.