Home / 128,269.20-192,403.80-104,649.60

Finding the Fourth Proportional to 128,269.20, 192,403.80 and 104,649.60

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Solution

The fourth proportional to 128,269.20, 192,403.80 and 104,649.60 is: 156,974.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,269.20 : 192,403.80 = 104,649.60 : x
  2. Step 2: Convert to fraction form
    128,269.20/192,403.80 = 104,649.60/x
  3. Step 3: Cross multiply
    128,269.20x = 192,403.80 × 104,649.60
  4. Step 4: Simplify right side
    128,269.20x = 20,134,980,708.48
  5. Step 5: Solve for x
    x = 20,134,980,708.48/128,269.20
  6. Step 6: Final answer
    x = 156,974.40

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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.