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Finding the Fourth Proportional to 128,533.91, 192,809.84 and 39,775.73

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Solution

The fourth proportional to 128,533.91, 192,809.84 and 39,775.73 is: 59,666.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,533.91 : 192,809.84 = 39,775.73 : x
  2. Step 2: Convert to fraction form
    128,533.91/192,809.84 = 39,775.73/x
  3. Step 3: Cross multiply
    128,533.91x = 192,809.84 × 39,775.73
  4. Step 4: Simplify right side
    128,533.91x = 7,669,150,974.26
  5. Step 5: Solve for x
    x = 7,669,150,974.26/128,533.91
  6. Step 6: Final answer
    x = 59,666.37

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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.