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Finding the Fourth Proportional to 86,702.22, 129,928.50 and 51,079.50

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Solution

The fourth proportional to 86,702.22, 129,928.50 and 51,079.50 is: 76,545.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,702.22 : 129,928.50 = 51,079.50 : x
  2. Step 2: Convert to fraction form
    86,702.22/129,928.50 = 51,079.50/x
  3. Step 3: Cross multiply
    86,702.22x = 129,928.50 × 51,079.50
  4. Step 4: Simplify right side
    86,702.22x = 6,636,682,815.75
  5. Step 5: Solve for x
    x = 6,636,682,815.75/86,702.22
  6. Step 6: Final answer
    x = 76,545.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.