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Finding the Fourth Proportional to 259,234.40, 388,851.60 and 81,795.80

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Solution

The fourth proportional to 259,234.40, 388,851.60 and 81,795.80 is: 122,693.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,234.40 : 388,851.60 = 81,795.80 : x
  2. Step 2: Convert to fraction form
    259,234.40/388,851.60 = 81,795.80/x
  3. Step 3: Cross multiply
    259,234.40x = 388,851.60 × 81,795.80
  4. Step 4: Simplify right side
    259,234.40x = 31,806,427,703.28
  5. Step 5: Solve for x
    x = 31,806,427,703.28/259,234.40
  6. Step 6: Final answer
    x = 122,693.70

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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.