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Finding the Fourth Proportional to 69,792, 104,721.60 and 34,734.72

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Solution

The fourth proportional to 69,792, 104,721.60 and 34,734.72 is: 52,118.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,792 : 104,721.60 = 34,734.72 : x
  2. Step 2: Convert to fraction form
    69,792/104,721.60 = 34,734.72/x
  3. Step 3: Cross multiply
    69,792x = 104,721.60 × 34,734.72
  4. Step 4: Simplify right side
    69,792x = 3,637,475,453.95
  5. Step 5: Solve for x
    x = 3,637,475,453.95/69,792
  6. Step 6: Final answer
    x = 52,118.80

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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.