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Finding the Fourth Proportional to 104,916.80, 157,144.80 and 91,092.80

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Solution

The fourth proportional to 104,916.80, 157,144.80 and 91,092.80 is: 136,439.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,916.80 : 157,144.80 = 91,092.80 : x
  2. Step 2: Convert to fraction form
    104,916.80/157,144.80 = 91,092.80/x
  3. Step 3: Cross multiply
    104,916.80x = 157,144.80 × 91,092.80
  4. Step 4: Simplify right side
    104,916.80x = 14,314,759,837.44
  5. Step 5: Solve for x
    x = 14,314,759,837.44/104,916.80
  6. Step 6: Final answer
    x = 136,439.16

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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.