Home / 204,002.80-306,004.20-85,807.60

Finding the Fourth Proportional to 204,002.80, 306,004.20 and 85,807.60

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Solution

The fourth proportional to 204,002.80, 306,004.20 and 85,807.60 is: 128,711.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,002.80 : 306,004.20 = 85,807.60 : x
  2. Step 2: Convert to fraction form
    204,002.80/306,004.20 = 85,807.60/x
  3. Step 3: Cross multiply
    204,002.80x = 306,004.20 × 85,807.60
  4. Step 4: Simplify right side
    204,002.80x = 26,257,485,991.92
  5. Step 5: Solve for x
    x = 26,257,485,991.92/204,002.80
  6. Step 6: Final answer
    x = 128,711.40

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1.5x scale

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.