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Finding the Fourth Proportional to 81,607,843.80, 122,411,765.70 and 80,852,016.60

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Solution

The fourth proportional to 81,607,843.80, 122,411,765.70 and 80,852,016.60 is: 121,278,024.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,607,843.80 : 122,411,765.70 = 80,852,016.60 : x
  2. Step 2: Convert to fraction form
    81,607,843.80/122,411,765.70 = 80,852,016.60/x
  3. Step 3: Cross multiply
    81,607,843.80x = 122,411,765.70 × 80,852,016.60
  4. Step 4: Simplify right side
    81,607,843.80x = 9,897,238,112,411,710
  5. Step 5: Solve for x
    x = 9,897,238,112,411,710/81,607,843.80
  6. Step 6: Final answer
    x = 121,278,024.90

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1.5x scale

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.