Home / 128,156.12-192,303.12-53,327.92

Finding the Fourth Proportional to 128,156.12, 192,303.12 and 53,327.92

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Solution

The fourth proportional to 128,156.12, 192,303.12 and 53,327.92 is: 80,020.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,156.12 : 192,303.12 = 53,327.92 : x
  2. Step 2: Convert to fraction form
    128,156.12/192,303.12 = 53,327.92/x
  3. Step 3: Cross multiply
    128,156.12x = 192,303.12 × 53,327.92
  4. Step 4: Simplify right side
    128,156.12x = 10,255,125,399.11
  5. Step 5: Solve for x
    x = 10,255,125,399.11/128,156.12
  6. Step 6: Final answer
    x = 80,020.57

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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.