Home / 68,121.42-102,156.21-31,159.50

Finding the Fourth Proportional to 68,121.42, 102,156.21 and 31,159.50

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Solution

The fourth proportional to 68,121.42, 102,156.21 and 31,159.50 is: 46,727.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,121.42 : 102,156.21 = 31,159.50 : x
  2. Step 2: Convert to fraction form
    68,121.42/102,156.21 = 31,159.50/x
  3. Step 3: Cross multiply
    68,121.42x = 102,156.21 × 31,159.50
  4. Step 4: Simplify right side
    68,121.42x = 3,183,136,425.50
  5. Step 5: Solve for x
    x = 3,183,136,425.50/68,121.42
  6. Step 6: Final answer
    x = 46,727.39

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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.