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Finding the Fourth Proportional to 72,405.68, 108,600.50 and 19,103.06

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Solution

The fourth proportional to 72,405.68, 108,600.50 and 19,103.06 is: 28,652.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,405.68 : 108,600.50 = 19,103.06 : x
  2. Step 2: Convert to fraction form
    72,405.68/108,600.50 = 19,103.06/x
  3. Step 3: Cross multiply
    72,405.68x = 108,600.50 × 19,103.06
  4. Step 4: Simplify right side
    72,405.68x = 2,074,601,372.29
  5. Step 5: Solve for x
    x = 2,074,601,372.29/72,405.68
  6. Step 6: Final answer
    x = 28,652.47

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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.