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Finding the Fourth Proportional to 76,679.60, 105,813.84 and 43,147.76

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Solution

The fourth proportional to 76,679.60, 105,813.84 and 43,147.76 is: 59,541.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,679.60 : 105,813.84 = 43,147.76 : x
  2. Step 2: Convert to fraction form
    76,679.60/105,813.84 = 43,147.76/x
  3. Step 3: Cross multiply
    76,679.60x = 105,813.84 × 43,147.76
  4. Step 4: Simplify right side
    76,679.60x = 4,565,630,173.00
  5. Step 5: Solve for x
    x = 4,565,630,173.00/76,679.60
  6. Step 6: Final answer
    x = 59,541.65

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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.