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Finding the Fourth Proportional to 51,289.62, 70,702.14 and 39,939.09

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Solution

The fourth proportional to 51,289.62, 70,702.14 and 39,939.09 is: 55,055.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,289.62 : 70,702.14 = 39,939.09 : x
  2. Step 2: Convert to fraction form
    51,289.62/70,702.14 = 39,939.09/x
  3. Step 3: Cross multiply
    51,289.62x = 70,702.14 × 39,939.09
  4. Step 4: Simplify right side
    51,289.62x = 2,823,779,132.65
  5. Step 5: Solve for x
    x = 2,823,779,132.65/51,289.62
  6. Step 6: Final answer
    x = 55,055.57

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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.