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Finding the Fourth Proportional to 69,828.60, 104,734.80 and 19,916.40

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Solution

The fourth proportional to 69,828.60, 104,734.80 and 19,916.40 is: 29,872.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,828.60 : 104,734.80 = 19,916.40 : x
  2. Step 2: Convert to fraction form
    69,828.60/104,734.80 = 19,916.40/x
  3. Step 3: Cross multiply
    69,828.60x = 104,734.80 × 19,916.40
  4. Step 4: Simplify right side
    69,828.60x = 2,085,940,170.72
  5. Step 5: Solve for x
    x = 2,085,940,170.72/69,828.60
  6. Step 6: Final answer
    x = 29,872.29

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1.5x scale

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.