Home / 128,518.40-192,777.60-90,464.60

Finding the Fourth Proportional to 128,518.40, 192,777.60 and 90,464.60

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Solution

The fourth proportional to 128,518.40, 192,777.60 and 90,464.60 is: 135,696.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,518.40 : 192,777.60 = 90,464.60 : x
  2. Step 2: Convert to fraction form
    128,518.40/192,777.60 = 90,464.60/x
  3. Step 3: Cross multiply
    128,518.40x = 192,777.60 × 90,464.60
  4. Step 4: Simplify right side
    128,518.40x = 17,439,548,472.96
  5. Step 5: Solve for x
    x = 17,439,548,472.96/128,518.40
  6. Step 6: Final answer
    x = 135,696.90

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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.