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Finding the Fourth Proportional to 72,418.55, 108,657.83 and 39,099.44

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Solution

The fourth proportional to 72,418.55, 108,657.83 and 39,099.44 is: 58,665.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,418.55 : 108,657.83 = 39,099.44 : x
  2. Step 2: Convert to fraction form
    72,418.55/108,657.83 = 39,099.44/x
  3. Step 3: Cross multiply
    72,418.55x = 108,657.83 × 39,099.44
  4. Step 4: Simplify right side
    72,418.55x = 4,248,460,380.76
  5. Step 5: Solve for x
    x = 4,248,460,380.76/72,418.55
  6. Step 6: Final answer
    x = 58,665.37

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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.