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Finding the Fourth Proportional to 128,496.64, 192,662.72 and 61,803.96

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Solution

The fourth proportional to 128,496.64, 192,662.72 and 61,803.96 is: 92,666.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,496.64 : 192,662.72 = 61,803.96 : x
  2. Step 2: Convert to fraction form
    128,496.64/192,662.72 = 61,803.96/x
  3. Step 3: Cross multiply
    128,496.64x = 192,662.72 × 61,803.96
  4. Step 4: Simplify right side
    128,496.64x = 11,907,319,040.37
  5. Step 5: Solve for x
    x = 11,907,319,040.37/128,496.64
  6. Step 6: Final answer
    x = 92,666.38

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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.