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Finding the Fourth Proportional to 99,651.78, 149,477.67 and 68,392.26

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Solution

The fourth proportional to 99,651.78, 149,477.67 and 68,392.26 is: 102,588.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,651.78 : 149,477.67 = 68,392.26 : x
  2. Step 2: Convert to fraction form
    99,651.78/149,477.67 = 68,392.26/x
  3. Step 3: Cross multiply
    99,651.78x = 149,477.67 × 68,392.26
  4. Step 4: Simplify right side
    99,651.78x = 10,223,115,670.83
  5. Step 5: Solve for x
    x = 10,223,115,670.83/99,651.78
  6. Step 6: Final answer
    x = 102,588.39

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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.