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Finding the Fourth Proportional to 104,539.80, 156,579.30 and 90,715.80

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Solution

The fourth proportional to 104,539.80, 156,579.30 and 90,715.80 is: 135,873.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,539.80 : 156,579.30 = 90,715.80 : x
  2. Step 2: Convert to fraction form
    104,539.80/156,579.30 = 90,715.80/x
  3. Step 3: Cross multiply
    104,539.80x = 156,579.30 × 90,715.80
  4. Step 4: Simplify right side
    104,539.80x = 14,204,216,462.94
  5. Step 5: Solve for x
    x = 14,204,216,462.94/104,539.80
  6. Step 6: Final answer
    x = 135,873.77

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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.