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Finding the Fourth Proportional to 259,663.95, 389,670.48 and 91,185.57

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Solution

The fourth proportional to 259,663.95, 389,670.48 and 91,185.57 is: 136,839.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,663.95 : 389,670.48 = 91,185.57 : x
  2. Step 2: Convert to fraction form
    259,663.95/389,670.48 = 91,185.57/x
  3. Step 3: Cross multiply
    259,663.95x = 389,670.48 × 91,185.57
  4. Step 4: Simplify right side
    259,663.95x = 35,532,324,830.97
  5. Step 5: Solve for x
    x = 35,532,324,830.97/259,663.95
  6. Step 6: Final answer
    x = 136,839.65

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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.