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Finding the Fourth Proportional to 104,558.70, 156,821.56 and 86,902.72

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Solution

The fourth proportional to 104,558.70, 156,821.56 and 86,902.72 is: 130,340.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,558.70 : 156,821.56 = 86,902.72 : x
  2. Step 2: Convert to fraction form
    104,558.70/156,821.56 = 86,902.72/x
  3. Step 3: Cross multiply
    104,558.70x = 156,821.56 × 86,902.72
  4. Step 4: Simplify right side
    104,558.70x = 13,628,220,118.64
  5. Step 5: Solve for x
    x = 13,628,220,118.64/104,558.70
  6. Step 6: Final answer
    x = 130,340.37

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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.