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Finding the Fourth Proportional to 100,899.99, 139,251.81 and 75,362.01

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Solution

The fourth proportional to 100,899.99, 139,251.81 and 75,362.01 is: 104,006.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,899.99 : 139,251.81 = 75,362.01 : x
  2. Step 2: Convert to fraction form
    100,899.99/139,251.81 = 75,362.01/x
  3. Step 3: Cross multiply
    100,899.99x = 139,251.81 × 75,362.01
  4. Step 4: Simplify right side
    100,899.99x = 10,494,296,297.74
  5. Step 5: Solve for x
    x = 10,494,296,297.74/100,899.99
  6. Step 6: Final answer
    x = 104,006.91

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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.