Home / 128,631.36-192,965.72-39,892.02

Finding the Fourth Proportional to 128,631.36, 192,965.72 and 39,892.02

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Solution

The fourth proportional to 128,631.36, 192,965.72 and 39,892.02 is: 59,843.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,631.36 : 192,965.72 = 39,892.02 : x
  2. Step 2: Convert to fraction form
    128,631.36/192,965.72 = 39,892.02/x
  3. Step 3: Cross multiply
    128,631.36x = 192,965.72 × 39,892.02
  4. Step 4: Simplify right side
    128,631.36x = 7,697,792,361.55
  5. Step 5: Solve for x
    x = 7,697,792,361.55/128,631.36
  6. Step 6: Final answer
    x = 59,843.82

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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.