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Finding the Fourth Proportional to 128,416.66, 192,660.53 and 53,572.05

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Solution

The fourth proportional to 128,416.66, 192,660.53 and 53,572.05 is: 80,372.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,416.66 : 192,660.53 = 53,572.05 : x
  2. Step 2: Convert to fraction form
    128,416.66/192,660.53 = 53,572.05/x
  3. Step 3: Cross multiply
    128,416.66x = 192,660.53 × 53,572.05
  4. Step 4: Simplify right side
    128,416.66x = 10,321,219,278.33
  5. Step 5: Solve for x
    x = 10,321,219,278.33/128,416.66
  6. Step 6: Final answer
    x = 80,372.90

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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.