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Finding the Fourth Proportional to 127,856,648.80, 191,809,856.40 and 55,073,288.80

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Solution

The fourth proportional to 127,856,648.80, 191,809,856.40 and 55,073,288.80 is: 82,620,651.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,856,648.80 : 191,809,856.40 = 55,073,288.80 : x
  2. Step 2: Convert to fraction form
    127,856,648.80/191,809,856.40 = 55,073,288.80/x
  3. Step 3: Cross multiply
    127,856,648.80x = 191,809,856.40 × 55,073,288.80
  4. Step 4: Simplify right side
    127,856,648.80x = 10,563,599,616,203,728
  5. Step 5: Solve for x
    x = 10,563,599,616,203,728/127,856,648.80
  6. Step 6: Final answer
    x = 82,620,651.45

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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.