Home / 129,413.64-178,563.37-81,639.30

Finding the Fourth Proportional to 129,413.64, 178,563.37 and 81,639.30

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Solution

The fourth proportional to 129,413.64, 178,563.37 and 81,639.30 is: 112,644.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,413.64 : 178,563.37 = 81,639.30 : x
  2. Step 2: Convert to fraction form
    129,413.64/178,563.37 = 81,639.30/x
  3. Step 3: Cross multiply
    129,413.64x = 178,563.37 × 81,639.30
  4. Step 4: Simplify right side
    129,413.64x = 14,577,788,532.44
  5. Step 5: Solve for x
    x = 14,577,788,532.44/129,413.64
  6. Step 6: Final answer
    x = 112,644.92

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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.