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Finding the Fourth Proportional to 128,194.48, 176,912.16 and 71,604.64

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Solution

The fourth proportional to 128,194.48, 176,912.16 and 71,604.64 is: 98,816.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,194.48 : 176,912.16 = 71,604.64 : x
  2. Step 2: Convert to fraction form
    128,194.48/176,912.16 = 71,604.64/x
  3. Step 3: Cross multiply
    128,194.48x = 176,912.16 × 71,604.64
  4. Step 4: Simplify right side
    128,194.48x = 12,667,731,528.42
  5. Step 5: Solve for x
    x = 12,667,731,528.42/128,194.48
  6. Step 6: Final answer
    x = 98,816.51

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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.