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Finding the Fourth Proportional to 69,528.50, 104,295.99 and 20,280.50

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Solution

The fourth proportional to 69,528.50, 104,295.99 and 20,280.50 is: 30,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,528.50 : 104,295.99 = 20,280.50 : x
  2. Step 2: Convert to fraction form
    69,528.50/104,295.99 = 20,280.50/x
  3. Step 3: Cross multiply
    69,528.50x = 104,295.99 × 20,280.50
  4. Step 4: Simplify right side
    69,528.50x = 2,115,174,825.20
  5. Step 5: Solve for x
    x = 2,115,174,825.20/69,528.50
  6. Step 6: Final answer
    x = 30,421.70

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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.