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Finding the Fourth Proportional to 208,178.40, 312,413.40 and 89,934.60

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Solution

The fourth proportional to 208,178.40, 312,413.40 and 89,934.60 is: 134,964.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,178.40 : 312,413.40 = 89,934.60 : x
  2. Step 2: Convert to fraction form
    208,178.40/312,413.40 = 89,934.60/x
  3. Step 3: Cross multiply
    208,178.40x = 312,413.40 × 89,934.60
  4. Step 4: Simplify right side
    208,178.40x = 28,096,774,163.64
  5. Step 5: Solve for x
    x = 28,096,774,163.64/208,178.40
  6. Step 6: Final answer
    x = 134,964.89

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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.