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Finding the Fourth Proportional to 99,998.85, 137,992.78 and 54,668.42

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Solution

The fourth proportional to 99,998.85, 137,992.78 and 54,668.42 is: 75,439.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,998.85 : 137,992.78 = 54,668.42 : x
  2. Step 2: Convert to fraction form
    99,998.85/137,992.78 = 54,668.42/x
  3. Step 3: Cross multiply
    99,998.85x = 137,992.78 × 54,668.42
  4. Step 4: Simplify right side
    99,998.85x = 7,543,847,254.01
  5. Step 5: Solve for x
    x = 7,543,847,254.01/99,998.85
  6. Step 6: Final answer
    x = 75,439.34

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1.5x scale

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.