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Finding the Fourth Proportional to 78,413.60, 117,621.63 and 28,462.52

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Solution

The fourth proportional to 78,413.60, 117,621.63 and 28,462.52 is: 42,694.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,413.60 : 117,621.63 = 28,462.52 : x
  2. Step 2: Convert to fraction form
    78,413.60/117,621.63 = 28,462.52/x
  3. Step 3: Cross multiply
    78,413.60x = 117,621.63 × 28,462.52
  4. Step 4: Simplify right side
    78,413.60x = 3,347,807,408.20
  5. Step 5: Solve for x
    x = 3,347,807,408.20/78,413.60
  6. Step 6: Final answer
    x = 42,694.22

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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.