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Finding the Fourth Proportional to 86,137.85, 118,876.88 and 51,683.87

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Solution

The fourth proportional to 86,137.85, 118,876.88 and 51,683.87 is: 71,327.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,137.85 : 118,876.88 = 51,683.87 : x
  2. Step 2: Convert to fraction form
    86,137.85/118,876.88 = 51,683.87/x
  3. Step 3: Cross multiply
    86,137.85x = 118,876.88 × 51,683.87
  4. Step 4: Simplify right side
    86,137.85x = 6,144,016,804.91
  5. Step 5: Solve for x
    x = 6,144,016,804.91/86,137.85
  6. Step 6: Final answer
    x = 71,327.72

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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.