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Finding the Fourth Proportional to 69,155.20, 103,732.80 and 67,619.20

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Solution

The fourth proportional to 69,155.20, 103,732.80 and 67,619.20 is: 101,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,155.20 : 103,732.80 = 67,619.20 : x
  2. Step 2: Convert to fraction form
    69,155.20/103,732.80 = 67,619.20/x
  3. Step 3: Cross multiply
    69,155.20x = 103,732.80 × 67,619.20
  4. Step 4: Simplify right side
    69,155.20x = 7,014,328,949.76
  5. Step 5: Solve for x
    x = 7,014,328,949.76/69,155.20
  6. Step 6: Final answer
    x = 101,428.80

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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.