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Finding the Fourth Proportional to 128,579.64, 192,675.69 and 114,564.72

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Solution

The fourth proportional to 128,579.64, 192,675.69 and 114,564.72 is: 171,674.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,579.64 : 192,675.69 = 114,564.72 : x
  2. Step 2: Convert to fraction form
    128,579.64/192,675.69 = 114,564.72/x
  3. Step 3: Cross multiply
    128,579.64x = 192,675.69 × 114,564.72
  4. Step 4: Simplify right side
    128,579.64x = 22,073,836,475.66
  5. Step 5: Solve for x
    x = 22,073,836,475.66/128,579.64
  6. Step 6: Final answer
    x = 171,674.43

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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.