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Finding the Fourth Proportional to 259,272, 357,795.60 and 140,040

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Solution

The fourth proportional to 259,272, 357,795.60 and 140,040 is: 193,255.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,272 : 357,795.60 = 140,040 : x
  2. Step 2: Convert to fraction form
    259,272/357,795.60 = 140,040/x
  3. Step 3: Cross multiply
    259,272x = 357,795.60 × 140,040
  4. Step 4: Simplify right side
    259,272x = 50,105,695,824
  5. Step 5: Solve for x
    x = 50,105,695,824/259,272
  6. Step 6: Final answer
    x = 193,255.33

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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.