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Finding the Fourth Proportional to 72,190.85, 108,271.69 and 19,600.79

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Solution

The fourth proportional to 72,190.85, 108,271.69 and 19,600.79 is: 29,397.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,190.85 : 108,271.69 = 19,600.79 : x
  2. Step 2: Convert to fraction form
    72,190.85/108,271.69 = 19,600.79/x
  3. Step 3: Cross multiply
    72,190.85x = 108,271.69 × 19,600.79
  4. Step 4: Simplify right side
    72,190.85x = 2,122,210,068.27
  5. Step 5: Solve for x
    x = 2,122,210,068.27/72,190.85
  6. Step 6: Final answer
    x = 29,397.22

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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.