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Finding the Fourth Proportional to 104,407.20, 156,610.80 and 51,919.20

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Solution

The fourth proportional to 104,407.20, 156,610.80 and 51,919.20 is: 77,878.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,407.20 : 156,610.80 = 51,919.20 : x
  2. Step 2: Convert to fraction form
    104,407.20/156,610.80 = 51,919.20/x
  3. Step 3: Cross multiply
    104,407.20x = 156,610.80 × 51,919.20
  4. Step 4: Simplify right side
    104,407.20x = 8,131,107,447.36
  5. Step 5: Solve for x
    x = 8,131,107,447.36/104,407.20
  6. Step 6: Final answer
    x = 77,878.80

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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.