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Finding the Fourth Proportional to 66,935.90, 100,413.25 and 19,554.47

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Solution

The fourth proportional to 66,935.90, 100,413.25 and 19,554.47 is: 29,334.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,935.90 : 100,413.25 = 19,554.47 : x
  2. Step 2: Convert to fraction form
    66,935.90/100,413.25 = 19,554.47/x
  3. Step 3: Cross multiply
    66,935.90x = 100,413.25 × 19,554.47
  4. Step 4: Simplify right side
    66,935.90x = 1,963,528,086.87
  5. Step 5: Solve for x
    x = 1,963,528,086.87/66,935.90
  6. Step 6: Final answer
    x = 29,334.45

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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.