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Finding the Fourth Proportional to 80,603.51, 120,968.24 and 55,817.30

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Solution

The fourth proportional to 80,603.51, 120,968.24 and 55,817.30 is: 83,769.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,603.51 : 120,968.24 = 55,817.30 : x
  2. Step 2: Convert to fraction form
    80,603.51/120,968.24 = 55,817.30/x
  3. Step 3: Cross multiply
    80,603.51x = 120,968.24 × 55,817.30
  4. Step 4: Simplify right side
    80,603.51x = 6,752,120,565.89
  5. Step 5: Solve for x
    x = 6,752,120,565.89/80,603.51
  6. Step 6: Final answer
    x = 83,769.57

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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.