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Finding the Fourth Proportional to 81,619.55, 122,702.70 and 70,793.90

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Solution

The fourth proportional to 81,619.55, 122,702.70 and 70,793.90 is: 106,427.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,619.55 : 122,702.70 = 70,793.90 : x
  2. Step 2: Convert to fraction form
    81,619.55/122,702.70 = 70,793.90/x
  3. Step 3: Cross multiply
    81,619.55x = 122,702.70 × 70,793.90
  4. Step 4: Simplify right side
    81,619.55x = 8,686,602,673.53
  5. Step 5: Solve for x
    x = 8,686,602,673.53/81,619.55
  6. Step 6: Final answer
    x = 106,427.97

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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.