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Finding the Fourth Proportional to 76,728.53, 105,890.70 and 46,515.13

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Solution

The fourth proportional to 76,728.53, 105,890.70 and 46,515.13 is: 64,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,728.53 : 105,890.70 = 46,515.13 : x
  2. Step 2: Convert to fraction form
    76,728.53/105,890.70 = 46,515.13/x
  3. Step 3: Cross multiply
    76,728.53x = 105,890.70 × 46,515.13
  4. Step 4: Simplify right side
    76,728.53x = 4,925,519,324.35
  5. Step 5: Solve for x
    x = 4,925,519,324.35/76,728.53
  6. Step 6: Final answer
    x = 64,194.10

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