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Finding the Fourth Proportional to 218,239,647.60, 327,485,442.60 and 81,938,809.20

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Solution

The fourth proportional to 218,239,647.60, 327,485,442.60 and 81,938,809.20 is: 122,955,510.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,239,647.60 : 327,485,442.60 = 81,938,809.20 : x
  2. Step 2: Convert to fraction form
    218,239,647.60/327,485,442.60 = 81,938,809.20/x
  3. Step 3: Cross multiply
    218,239,647.60x = 327,485,442.60 × 81,938,809.20
  4. Step 4: Simplify right side
    218,239,647.60x = 26,833,767,196,978,956
  5. Step 5: Solve for x
    x = 26,833,767,196,978,956/218,239,647.60
  6. Step 6: Final answer
    x = 122,955,510.11

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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.