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Finding the Fourth Proportional to 104,638.80, 156,958.20 and 55,486.80

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Solution

The fourth proportional to 104,638.80, 156,958.20 and 55,486.80 is: 83,230.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,638.80 : 156,958.20 = 55,486.80 : x
  2. Step 2: Convert to fraction form
    104,638.80/156,958.20 = 55,486.80/x
  3. Step 3: Cross multiply
    104,638.80x = 156,958.20 × 55,486.80
  4. Step 4: Simplify right side
    104,638.80x = 8,709,108,251.76
  5. Step 5: Solve for x
    x = 8,709,108,251.76/104,638.80
  6. Step 6: Final answer
    x = 83,230.20

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1.5x scale

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.