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Finding the Fourth Proportional to 266,413.76, 399,611.43 and 66,735.87

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Solution

The fourth proportional to 266,413.76, 399,611.43 and 66,735.87 is: 100,101.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,413.76 : 399,611.43 = 66,735.87 : x
  2. Step 2: Convert to fraction form
    266,413.76/399,611.43 = 66,735.87/x
  3. Step 3: Cross multiply
    266,413.76x = 399,611.43 × 66,735.87
  4. Step 4: Simplify right side
    266,413.76x = 26,668,416,442.99
  5. Step 5: Solve for x
    x = 26,668,416,442.99/266,413.76
  6. Step 6: Final answer
    x = 100,101.50

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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.