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Finding the Fourth Proportional to 85,789.65, 118,389.74 and 47,554.97

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Solution

The fourth proportional to 85,789.65, 118,389.74 and 47,554.97 is: 65,625.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,789.65 : 118,389.74 = 47,554.97 : x
  2. Step 2: Convert to fraction form
    85,789.65/118,389.74 = 47,554.97/x
  3. Step 3: Cross multiply
    85,789.65x = 118,389.74 × 47,554.97
  4. Step 4: Simplify right side
    85,789.65x = 5,630,019,704.28
  5. Step 5: Solve for x
    x = 5,630,019,704.28/85,789.65
  6. Step 6: Final answer
    x = 65,625.86

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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.