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Finding the Fourth Proportional to 99,561.90, 137,394.88 and 54,239.79

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Solution

The fourth proportional to 99,561.90, 137,394.88 and 54,239.79 is: 74,850.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,561.90 : 137,394.88 = 54,239.79 : x
  2. Step 2: Convert to fraction form
    99,561.90/137,394.88 = 54,239.79/x
  3. Step 3: Cross multiply
    99,561.90x = 137,394.88 × 54,239.79
  4. Step 4: Simplify right side
    99,561.90x = 7,452,269,817.91
  5. Step 5: Solve for x
    x = 7,452,269,817.91/99,561.90
  6. Step 6: Final answer
    x = 74,850.62

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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.