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Finding the Fourth Proportional to 99,673.80, 149,741.10 and 68,569.80

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Solution

The fourth proportional to 99,673.80, 149,741.10 and 68,569.80 is: 103,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,673.80 : 149,741.10 = 68,569.80 : x
  2. Step 2: Convert to fraction form
    99,673.80/149,741.10 = 68,569.80/x
  3. Step 3: Cross multiply
    99,673.80x = 149,741.10 × 68,569.80
  4. Step 4: Simplify right side
    99,673.80x = 10,267,717,278.78
  5. Step 5: Solve for x
    x = 10,267,717,278.78/99,673.80
  6. Step 6: Final answer
    x = 103,013.20

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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.