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Finding the Fourth Proportional to 115,725.99, 159,694.32 and 64,729.87

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Solution

The fourth proportional to 115,725.99, 159,694.32 and 64,729.87 is: 89,323.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,725.99 : 159,694.32 = 64,729.87 : x
  2. Step 2: Convert to fraction form
    115,725.99/159,694.32 = 64,729.87/x
  3. Step 3: Cross multiply
    115,725.99x = 159,694.32 × 64,729.87
  4. Step 4: Simplify right side
    115,725.99x = 10,336,992,573.34
  5. Step 5: Solve for x
    x = 10,336,992,573.34/115,725.99
  6. Step 6: Final answer
    x = 89,323.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.