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Finding the Fourth Proportional to 128,043.72, 192,163.59 and 57,972.24

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Solution

The fourth proportional to 128,043.72, 192,163.59 and 57,972.24 is: 87,002.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,043.72 : 192,163.59 = 57,972.24 : x
  2. Step 2: Convert to fraction form
    128,043.72/192,163.59 = 57,972.24/x
  3. Step 3: Cross multiply
    128,043.72x = 192,163.59 × 57,972.24
  4. Step 4: Simplify right side
    128,043.72x = 11,140,153,758.74
  5. Step 5: Solve for x
    x = 11,140,153,758.74/128,043.72
  6. Step 6: Final answer
    x = 87,002.73

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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.