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Finding the Fourth Proportional to 81,662,490.80, 122,493,736.20 and 36,224,285.30

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Solution

The fourth proportional to 81,662,490.80, 122,493,736.20 and 36,224,285.30 is: 54,336,427.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,662,490.80 : 122,493,736.20 = 36,224,285.30 : x
  2. Step 2: Convert to fraction form
    81,662,490.80/122,493,736.20 = 36,224,285.30/x
  3. Step 3: Cross multiply
    81,662,490.80x = 122,493,736.20 × 36,224,285.30
  4. Step 4: Simplify right side
    81,662,490.80x = 4,437,248,047,571,737.50
  5. Step 5: Solve for x
    x = 4,437,248,047,571,737.50/81,662,490.80
  6. Step 6: Final answer
    x = 54,336,427.95

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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.