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Finding the Fourth Proportional to 104,528.80, 156,562.80 and 90,704.80

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Solution

The fourth proportional to 104,528.80, 156,562.80 and 90,704.80 is: 135,857.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,528.80 : 156,562.80 = 90,704.80 : x
  2. Step 2: Convert to fraction form
    104,528.80/156,562.80 = 90,704.80/x
  3. Step 3: Cross multiply
    104,528.80x = 156,562.80 × 90,704.80
  4. Step 4: Simplify right side
    104,528.80x = 14,200,997,461.44
  5. Step 5: Solve for x
    x = 14,200,997,461.44/104,528.80
  6. Step 6: Final answer
    x = 135,857.27

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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.