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Finding the Fourth Proportional to 172,413.72, 237,963.60 and 107,912.88

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Solution

The fourth proportional to 172,413.72, 237,963.60 and 107,912.88 is: 148,940.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,413.72 : 237,963.60 = 107,912.88 : x
  2. Step 2: Convert to fraction form
    172,413.72/237,963.60 = 107,912.88/x
  3. Step 3: Cross multiply
    172,413.72x = 237,963.60 × 107,912.88
  4. Step 4: Simplify right side
    172,413.72x = 25,679,337,411.17
  5. Step 5: Solve for x
    x = 25,679,337,411.17/172,413.72
  6. Step 6: Final answer
    x = 148,940.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.