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Finding the Fourth Proportional to 99,609.18, 137,458.89 and 54,286.89

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Solution

The fourth proportional to 99,609.18, 137,458.89 and 54,286.89 is: 74,914.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,609.18 : 137,458.89 = 54,286.89 : x
  2. Step 2: Convert to fraction form
    99,609.18/137,458.89 = 54,286.89/x
  3. Step 3: Cross multiply
    99,609.18x = 137,458.89 × 54,286.89
  4. Step 4: Simplify right side
    99,609.18x = 7,462,215,640.95
  5. Step 5: Solve for x
    x = 7,462,215,640.95/99,609.18
  6. Step 6: Final answer
    x = 74,914.94

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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.