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Finding the Fourth Proportional to 128,393.94, 192,486.57 and 53,569.83

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Solution

The fourth proportional to 128,393.94, 192,486.57 and 53,569.83 is: 80,311.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,393.94 : 192,486.57 = 53,569.83 : x
  2. Step 2: Convert to fraction form
    128,393.94/192,486.57 = 53,569.83/x
  3. Step 3: Cross multiply
    128,393.94x = 192,486.57 × 53,569.83
  4. Step 4: Simplify right side
    128,393.94x = 10,311,472,832.18
  5. Step 5: Solve for x
    x = 10,311,472,832.18/128,393.94
  6. Step 6: Final answer
    x = 80,311.21

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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.