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Finding the Fourth Proportional to 91,413.80, 137,130.30 and 29,069.80

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Solution

The fourth proportional to 91,413.80, 137,130.30 and 29,069.80 is: 43,607.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,413.80 : 137,130.30 = 29,069.80 : x
  2. Step 2: Convert to fraction form
    91,413.80/137,130.30 = 29,069.80/x
  3. Step 3: Cross multiply
    91,413.80x = 137,130.30 × 29,069.80
  4. Step 4: Simplify right side
    91,413.80x = 3,986,350,394.94
  5. Step 5: Solve for x
    x = 3,986,350,394.94/91,413.80
  6. Step 6: Final answer
    x = 43,607.75

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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.