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Finding the Fourth Proportional to 66,585.63, 91,890.87 and 38,291.31

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Solution

The fourth proportional to 66,585.63, 91,890.87 and 38,291.31 is: 52,843.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,585.63 : 91,890.87 = 38,291.31 : x
  2. Step 2: Convert to fraction form
    66,585.63/91,890.87 = 38,291.31/x
  3. Step 3: Cross multiply
    66,585.63x = 91,890.87 × 38,291.31
  4. Step 4: Simplify right side
    66,585.63x = 3,518,621,789.34
  5. Step 5: Solve for x
    x = 3,518,621,789.34/66,585.63
  6. Step 6: Final answer
    x = 52,843.56

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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.