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Finding the Fourth Proportional to 128,361.62, 192,460.42 and 61,669.06

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Solution

The fourth proportional to 128,361.62, 192,460.42 and 61,669.06 is: 92,464.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,361.62 : 192,460.42 = 61,669.06 : x
  2. Step 2: Convert to fraction form
    128,361.62/192,460.42 = 61,669.06/x
  3. Step 3: Cross multiply
    128,361.62x = 192,460.42 × 61,669.06
  4. Step 4: Simplify right side
    128,361.62x = 11,868,853,188.61
  5. Step 5: Solve for x
    x = 11,868,853,188.61/128,361.62
  6. Step 6: Final answer
    x = 92,464.19

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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.