Home / 212,640.90-319,004.55-72,413.70

Finding the Fourth Proportional to 212,640.90, 319,004.55 and 72,413.70

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Solution

The fourth proportional to 212,640.90, 319,004.55 and 72,413.70 is: 108,635.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,640.90 : 319,004.55 = 72,413.70 : x
  2. Step 2: Convert to fraction form
    212,640.90/319,004.55 = 72,413.70/x
  3. Step 3: Cross multiply
    212,640.90x = 319,004.55 × 72,413.70
  4. Step 4: Simplify right side
    212,640.90x = 23,100,299,782.34
  5. Step 5: Solve for x
    x = 23,100,299,782.34/212,640.90
  6. Step 6: Final answer
    x = 108,635.26

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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.