Home / 128,256.11-192,419.40-53,411.30

Finding the Fourth Proportional to 128,256.11, 192,419.40 and 53,411.30

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Solution

The fourth proportional to 128,256.11, 192,419.40 and 53,411.30 is: 80,131.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,256.11 : 192,419.40 = 53,411.30 : x
  2. Step 2: Convert to fraction form
    128,256.11/192,419.40 = 53,411.30/x
  3. Step 3: Cross multiply
    128,256.11x = 192,419.40 × 53,411.30
  4. Step 4: Simplify right side
    128,256.11x = 10,277,370,299.22
  5. Step 5: Solve for x
    x = 10,277,370,299.22/128,256.11
  6. Step 6: Final answer
    x = 80,131.62

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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.