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Finding the Fourth Proportional to 68,980.75, 103,384.56 and 29,491.45

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Solution

The fourth proportional to 68,980.75, 103,384.56 and 29,491.45 is: 44,200.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,980.75 : 103,384.56 = 29,491.45 : x
  2. Step 2: Convert to fraction form
    68,980.75/103,384.56 = 29,491.45/x
  3. Step 3: Cross multiply
    68,980.75x = 103,384.56 × 29,491.45
  4. Step 4: Simplify right side
    68,980.75x = 3,048,960,582.01
  5. Step 5: Solve for x
    x = 3,048,960,582.01/68,980.75
  6. Step 6: Final answer
    x = 44,200.17

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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.