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Finding the Fourth Proportional to 99,670.91, 149,506.36 and 68,411.39

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Solution

The fourth proportional to 99,670.91, 149,506.36 and 68,411.39 is: 102,617.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,670.91 : 149,506.36 = 68,411.39 : x
  2. Step 2: Convert to fraction form
    99,670.91/149,506.36 = 68,411.39/x
  3. Step 3: Cross multiply
    99,670.91x = 149,506.36 × 68,411.39
  4. Step 4: Simplify right side
    99,670.91x = 10,227,936,982.88
  5. Step 5: Solve for x
    x = 10,227,936,982.88/99,670.91
  6. Step 6: Final answer
    x = 102,617.08

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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.