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Finding the Fourth Proportional to 78,559.54, 108,413.85 and 45,025.54

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Solution

The fourth proportional to 78,559.54, 108,413.85 and 45,025.54 is: 62,136.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,559.54 : 108,413.85 = 45,025.54 : x
  2. Step 2: Convert to fraction form
    78,559.54/108,413.85 = 45,025.54/x
  3. Step 3: Cross multiply
    78,559.54x = 108,413.85 × 45,025.54
  4. Step 4: Simplify right side
    78,559.54x = 4,881,392,139.73
  5. Step 5: Solve for x
    x = 4,881,392,139.73/78,559.54
  6. Step 6: Final answer
    x = 62,136.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.