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Finding the Fourth Proportional to 128,447.80, 192,662.10 and 53,548.60

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Solution

The fourth proportional to 128,447.80, 192,662.10 and 53,548.60 is: 80,318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,447.80 : 192,662.10 = 53,548.60 : x
  2. Step 2: Convert to fraction form
    128,447.80/192,662.10 = 53,548.60/x
  3. Step 3: Cross multiply
    128,447.80x = 192,662.10 × 53,548.60
  4. Step 4: Simplify right side
    128,447.80x = 10,316,785,728.06
  5. Step 5: Solve for x
    x = 10,316,785,728.06/128,447.80
  6. Step 6: Final answer
    x = 80,318.90

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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.