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Finding the Fourth Proportional to 91,601.78, 137,409.35 and 28,413.90

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Solution

The fourth proportional to 91,601.78, 137,409.35 and 28,413.90 is: 42,622.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,601.78 : 137,409.35 = 28,413.90 : x
  2. Step 2: Convert to fraction form
    91,601.78/137,409.35 = 28,413.90/x
  3. Step 3: Cross multiply
    91,601.78x = 137,409.35 × 28,413.90
  4. Step 4: Simplify right side
    91,601.78x = 3,904,335,387.90
  5. Step 5: Solve for x
    x = 3,904,335,387.90/91,601.78
  6. Step 6: Final answer
    x = 42,622.92

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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.