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Finding the Fourth Proportional to 81,648,016.80, 122,472,025.20 and 27,795,328.80

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Solution

The fourth proportional to 81,648,016.80, 122,472,025.20 and 27,795,328.80 is: 41,692,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,648,016.80 : 122,472,025.20 = 27,795,328.80 : x
  2. Step 2: Convert to fraction form
    81,648,016.80/122,472,025.20 = 27,795,328.80/x
  3. Step 3: Cross multiply
    81,648,016.80x = 122,472,025.20 × 27,795,328.80
  4. Step 4: Simplify right side
    81,648,016.80x = 3,404,150,209,235,886
  5. Step 5: Solve for x
    x = 3,404,150,209,235,886/81,648,016.80
  6. Step 6: Final answer
    x = 41,692,993.20

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Double scale
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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.