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Finding the Fourth Proportional to 72,019.68, 108,041.04 and 30,467.04

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Solution

The fourth proportional to 72,019.68, 108,041.04 and 30,467.04 is: 45,705.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,019.68 : 108,041.04 = 30,467.04 : x
  2. Step 2: Convert to fraction form
    72,019.68/108,041.04 = 30,467.04/x
  3. Step 3: Cross multiply
    72,019.68x = 108,041.04 × 30,467.04
  4. Step 4: Simplify right side
    72,019.68x = 3,291,690,687.32
  5. Step 5: Solve for x
    x = 3,291,690,687.32/72,019.68
  6. Step 6: Final answer
    x = 45,705.43

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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.