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Finding the Fourth Proportional to 143,901.70, 215,852.55 and 91,413.70

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Solution

The fourth proportional to 143,901.70, 215,852.55 and 91,413.70 is: 137,120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,901.70 : 215,852.55 = 91,413.70 : x
  2. Step 2: Convert to fraction form
    143,901.70/215,852.55 = 91,413.70/x
  3. Step 3: Cross multiply
    143,901.70x = 215,852.55 × 91,413.70
  4. Step 4: Simplify right side
    143,901.70x = 19,731,880,249.94
  5. Step 5: Solve for x
    x = 19,731,880,249.94/143,901.70
  6. Step 6: Final answer
    x = 137,120.55

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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.