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Finding the Fourth Proportional to 81,333,793.80, 122,000,690.70 and 27,480,328.20

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Solution

The fourth proportional to 81,333,793.80, 122,000,690.70 and 27,480,328.20 is: 41,220,492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,333,793.80 : 122,000,690.70 = 27,480,328.20 : x
  2. Step 2: Convert to fraction form
    81,333,793.80/122,000,690.70 = 27,480,328.20/x
  3. Step 3: Cross multiply
    81,333,793.80x = 122,000,690.70 × 27,480,328.20
  4. Step 4: Simplify right side
    81,333,793.80x = 3,352,619,021,062,687.50
  5. Step 5: Solve for x
    x = 3,352,619,021,062,687.50/81,333,793.80
  6. Step 6: Final answer
    x = 41,220,492.30

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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.