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Finding the Fourth Proportional to 258,174.79, 387,413.76 and 108,403.57

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Solution

The fourth proportional to 258,174.79, 387,413.76 and 108,403.57 is: 162,668.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,174.79 : 387,413.76 = 108,403.57 : x
  2. Step 2: Convert to fraction form
    258,174.79/387,413.76 = 108,403.57/x
  3. Step 3: Cross multiply
    258,174.79x = 387,413.76 × 108,403.57
  4. Step 4: Simplify right side
    258,174.79x = 41,997,033,057.82
  5. Step 5: Solve for x
    x = 41,997,033,057.82/258,174.79
  6. Step 6: Final answer
    x = 162,668.99

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1.5x scale

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.