Home / 81,651.12-122,366.52-61,867.68

Finding the Fourth Proportional to 81,651.12, 122,366.52 and 61,867.68

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Solution

The fourth proportional to 81,651.12, 122,366.52 and 61,867.68 is: 92,718.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,651.12 : 122,366.52 = 61,867.68 : x
  2. Step 2: Convert to fraction form
    81,651.12/122,366.52 = 61,867.68/x
  3. Step 3: Cross multiply
    81,651.12x = 122,366.52 × 61,867.68
  4. Step 4: Simplify right side
    81,651.12x = 7,570,532,702.07
  5. Step 5: Solve for x
    x = 7,570,532,702.07/81,651.12
  6. Step 6: Final answer
    x = 92,718.05

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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.