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Finding the Fourth Proportional to 69,720.54, 104,580.66 and 19,801.11

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Solution

The fourth proportional to 69,720.54, 104,580.66 and 19,801.11 is: 29,701.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,720.54 : 104,580.66 = 19,801.11 : x
  2. Step 2: Convert to fraction form
    69,720.54/104,580.66 = 19,801.11/x
  3. Step 3: Cross multiply
    69,720.54x = 104,580.66 × 19,801.11
  4. Step 4: Simplify right side
    69,720.54x = 2,070,813,152.53
  5. Step 5: Solve for x
    x = 2,070,813,152.53/69,720.54
  6. Step 6: Final answer
    x = 29,701.62

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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.