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Finding the Fourth Proportional to 183,930.57, 275,915.30 and 78,721.29

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Solution

The fourth proportional to 183,930.57, 275,915.30 and 78,721.29 is: 118,090.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    183,930.57 : 275,915.30 = 78,721.29 : x
  2. Step 2: Convert to fraction form
    183,930.57/275,915.30 = 78,721.29/x
  3. Step 3: Cross multiply
    183,930.57x = 275,915.30 × 78,721.29
  4. Step 4: Simplify right side
    183,930.57x = 21,720,407,953.13
  5. Step 5: Solve for x
    x = 21,720,407,953.13/183,930.57
  6. Step 6: Final answer
    x = 118,090.26

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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.