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Finding the Fourth Proportional to 115,866, 173,413.26 and 87,630.48

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Solution

The fourth proportional to 115,866, 173,413.26 and 87,630.48 is: 131,153.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,866 : 173,413.26 = 87,630.48 : x
  2. Step 2: Convert to fraction form
    115,866/173,413.26 = 87,630.48/x
  3. Step 3: Cross multiply
    115,866x = 173,413.26 × 87,630.48
  4. Step 4: Simplify right side
    115,866x = 15,196,287,212.16
  5. Step 5: Solve for x
    x = 15,196,287,212.16/115,866
  6. Step 6: Final answer
    x = 131,153.98

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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.