Home / 71,787.51-99,065.07-39,955.72

Finding the Fourth Proportional to 71,787.51, 99,065.07 and 39,955.72

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Solution

The fourth proportional to 71,787.51, 99,065.07 and 39,955.72 is: 55,137.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,787.51 : 99,065.07 = 39,955.72 : x
  2. Step 2: Convert to fraction form
    71,787.51/99,065.07 = 39,955.72/x
  3. Step 3: Cross multiply
    71,787.51x = 99,065.07 × 39,955.72
  4. Step 4: Simplify right side
    71,787.51x = 3,958,216,198.70
  5. Step 5: Solve for x
    x = 3,958,216,198.70/71,787.51
  6. Step 6: Final answer
    x = 55,137.95

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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.