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Finding the Fourth Proportional to 85,606.44, 128,413.02 and 26,436.84

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Solution

The fourth proportional to 85,606.44, 128,413.02 and 26,436.84 is: 39,656.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,606.44 : 128,413.02 = 26,436.84 : x
  2. Step 2: Convert to fraction form
    85,606.44/128,413.02 = 26,436.84/x
  3. Step 3: Cross multiply
    85,606.44x = 128,413.02 × 26,436.84
  4. Step 4: Simplify right side
    85,606.44x = 3,394,834,463.66
  5. Step 5: Solve for x
    x = 3,394,834,463.66/85,606.44
  6. Step 6: Final answer
    x = 39,656.30

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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.