Home / 78,276.64-117,413.60-31,528.32

Finding the Fourth Proportional to 78,276.64, 117,413.60 and 31,528.32

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Solution

The fourth proportional to 78,276.64, 117,413.60 and 31,528.32 is: 47,291.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,276.64 : 117,413.60 = 31,528.32 : x
  2. Step 2: Convert to fraction form
    78,276.64/117,413.60 = 31,528.32/x
  3. Step 3: Cross multiply
    78,276.64x = 117,413.60 × 31,528.32
  4. Step 4: Simplify right side
    78,276.64x = 3,701,853,553.15
  5. Step 5: Solve for x
    x = 3,701,853,553.15/78,276.64
  6. Step 6: Final answer
    x = 47,291.93

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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.