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Finding the Fourth Proportional to 292,274.30, 438,413.49 and 81,912.24

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Solution

The fourth proportional to 292,274.30, 438,413.49 and 81,912.24 is: 122,868.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,274.30 : 438,413.49 = 81,912.24 : x
  2. Step 2: Convert to fraction form
    292,274.30/438,413.49 = 81,912.24/x
  3. Step 3: Cross multiply
    292,274.30x = 438,413.49 × 81,912.24
  4. Step 4: Simplify right side
    292,274.30x = 35,911,431,012.12
  5. Step 5: Solve for x
    x = 35,911,431,012.12/292,274.30
  6. Step 6: Final answer
    x = 122,868.93

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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.