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Finding the Fourth Proportional to 171,608.60, 257,434.77 and 66,413.90

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Solution

The fourth proportional to 171,608.60, 257,434.77 and 66,413.90 is: 99,629.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,608.60 : 257,434.77 = 66,413.90 : x
  2. Step 2: Convert to fraction form
    171,608.60/257,434.77 = 66,413.90/x
  3. Step 3: Cross multiply
    171,608.60x = 257,434.77 × 66,413.90
  4. Step 4: Simplify right side
    171,608.60x = 17,097,247,071.30
  5. Step 5: Solve for x
    x = 17,097,247,071.30/171,608.60
  6. Step 6: Final answer
    x = 99,629.31

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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.