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Finding the Fourth Proportional to 128,499.96, 192,646.02 and 53,677.41

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Solution

The fourth proportional to 128,499.96, 192,646.02 and 53,677.41 is: 80,472.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,499.96 : 192,646.02 = 53,677.41 : x
  2. Step 2: Convert to fraction form
    128,499.96/192,646.02 = 53,677.41/x
  3. Step 3: Cross multiply
    128,499.96x = 192,646.02 × 53,677.41
  4. Step 4: Simplify right side
    128,499.96x = 10,340,739,400.41
  5. Step 5: Solve for x
    x = 10,340,739,400.41/128,499.96
  6. Step 6: Final answer
    x = 80,472.71

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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.