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Finding the Fourth Proportional to 209,871.60, 314,778.60 and 69,615.60

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Solution

The fourth proportional to 209,871.60, 314,778.60 and 69,615.60 is: 104,413.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,871.60 : 314,778.60 = 69,615.60 : x
  2. Step 2: Convert to fraction form
    209,871.60/314,778.60 = 69,615.60/x
  3. Step 3: Cross multiply
    209,871.60x = 314,778.60 × 69,615.60
  4. Step 4: Simplify right side
    209,871.60x = 21,913,501,106.16
  5. Step 5: Solve for x
    x = 21,913,501,106.16/209,871.60
  6. Step 6: Final answer
    x = 104,413.85

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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.