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Finding the Fourth Proportional to 143,413.15, 215,131.11 and 43,582.06

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Solution

The fourth proportional to 143,413.15, 215,131.11 and 43,582.06 is: 65,376.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,413.15 : 215,131.11 = 43,582.06 : x
  2. Step 2: Convert to fraction form
    143,413.15/215,131.11 = 43,582.06/x
  3. Step 3: Cross multiply
    143,413.15x = 215,131.11 × 43,582.06
  4. Step 4: Simplify right side
    143,413.15x = 9,375,856,943.89
  5. Step 5: Solve for x
    x = 9,375,856,943.89/143,413.15
  6. Step 6: Final answer
    x = 65,376.55

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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.