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Finding the Fourth Proportional to 128,016.48, 191,993.76 and 56,899.92

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Solution

The fourth proportional to 128,016.48, 191,993.76 and 56,899.92 is: 85,336.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,016.48 : 191,993.76 = 56,899.92 : x
  2. Step 2: Convert to fraction form
    128,016.48/191,993.76 = 56,899.92/x
  3. Step 3: Cross multiply
    128,016.48x = 191,993.76 × 56,899.92
  4. Step 4: Simplify right side
    128,016.48x = 10,924,429,584.50
  5. Step 5: Solve for x
    x = 10,924,429,584.50/128,016.48
  6. Step 6: Final answer
    x = 85,336.12

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.