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Finding the Fourth Proportional to 69,303.72, 103,968.41 and 21,930.74

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Solution

The fourth proportional to 69,303.72, 103,968.41 and 21,930.74 is: 32,900.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,303.72 : 103,968.41 = 21,930.74 : x
  2. Step 2: Convert to fraction form
    69,303.72/103,968.41 = 21,930.74/x
  3. Step 3: Cross multiply
    69,303.72x = 103,968.41 × 21,930.74
  4. Step 4: Simplify right side
    69,303.72x = 2,280,104,513.13
  5. Step 5: Solve for x
    x = 2,280,104,513.13/69,303.72
  6. Step 6: Final answer
    x = 32,900.17

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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.