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Finding the Fourth Proportional to 235,990.68, 325,663.38 and 128,562

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Solution

The fourth proportional to 235,990.68, 325,663.38 and 128,562 is: 177,413.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,990.68 : 325,663.38 = 128,562 : x
  2. Step 2: Convert to fraction form
    235,990.68/325,663.38 = 128,562/x
  3. Step 3: Cross multiply
    235,990.68x = 325,663.38 × 128,562
  4. Step 4: Simplify right side
    235,990.68x = 41,867,935,459.56
  5. Step 5: Solve for x
    x = 41,867,935,459.56/235,990.68
  6. Step 6: Final answer
    x = 177,413.51

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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.