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Finding the Fourth Proportional to 155,395.66, 214,439.78 and 87,413.98

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Solution

The fourth proportional to 155,395.66, 214,439.78 and 87,413.98 is: 120,627.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,395.66 : 214,439.78 = 87,413.98 : x
  2. Step 2: Convert to fraction form
    155,395.66/214,439.78 = 87,413.98/x
  3. Step 3: Cross multiply
    155,395.66x = 214,439.78 × 87,413.98
  4. Step 4: Simplify right side
    155,395.66x = 18,745,034,640.12
  5. Step 5: Solve for x
    x = 18,745,034,640.12/155,395.66
  6. Step 6: Final answer
    x = 120,627.79

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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.