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Finding the Fourth Proportional to 77,840.69, 107,413.77 and 43,838.31

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Solution

The fourth proportional to 77,840.69, 107,413.77 and 43,838.31 is: 60,493.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,840.69 : 107,413.77 = 43,838.31 : x
  2. Step 2: Convert to fraction form
    77,840.69/107,413.77 = 43,838.31/x
  3. Step 3: Cross multiply
    77,840.69x = 107,413.77 × 43,838.31
  4. Step 4: Simplify right side
    77,840.69x = 4,708,838,147.53
  5. Step 5: Solve for x
    x = 4,708,838,147.53/77,840.69
  6. Step 6: Final answer
    x = 60,493.27

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1.5x scale

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.