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Finding the Fourth Proportional to 139,277.72, 208,889.86 and 39,413.80

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Solution

The fourth proportional to 139,277.72, 208,889.86 and 39,413.80 is: 59,113.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,277.72 : 208,889.86 = 39,413.80 : x
  2. Step 2: Convert to fraction form
    139,277.72/208,889.86 = 39,413.80/x
  3. Step 3: Cross multiply
    139,277.72x = 208,889.86 × 39,413.80
  4. Step 4: Simplify right side
    139,277.72x = 8,233,143,164.07
  5. Step 5: Solve for x
    x = 8,233,143,164.07/139,277.72
  6. Step 6: Final answer
    x = 59,113.14

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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.