Home / 81,721.10-122,507.84-39,574.98

Finding the Fourth Proportional to 81,721.10, 122,507.84 and 39,574.98

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Solution

The fourth proportional to 81,721.10, 122,507.84 and 39,574.98 is: 59,326.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,721.10 : 122,507.84 = 39,574.98 : x
  2. Step 2: Convert to fraction form
    81,721.10/122,507.84 = 39,574.98/x
  3. Step 3: Cross multiply
    81,721.10x = 122,507.84 × 39,574.98
  4. Step 4: Simplify right side
    81,721.10x = 4,848,245,416.78
  5. Step 5: Solve for x
    x = 4,848,245,416.78/81,721.10
  6. Step 6: Final answer
    x = 59,326.73

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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.