Home / 71,822.09-99,113.52-39,990.99

Finding the Fourth Proportional to 71,822.09, 99,113.52 and 39,990.99

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Solution

The fourth proportional to 71,822.09, 99,113.52 and 39,990.99 is: 55,187.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,822.09 : 99,113.52 = 39,990.99 : x
  2. Step 2: Convert to fraction form
    71,822.09/99,113.52 = 39,990.99/x
  3. Step 3: Cross multiply
    71,822.09x = 99,113.52 × 39,990.99
  4. Step 4: Simplify right side
    71,822.09x = 3,963,647,787.18
  5. Step 5: Solve for x
    x = 3,963,647,787.18/71,822.09
  6. Step 6: Final answer
    x = 55,187.03

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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.