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Finding the Fourth Proportional to 262,464,009.80, 393,696,014.70 and 80,687,568.20

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Solution

The fourth proportional to 262,464,009.80, 393,696,014.70 and 80,687,568.20 is: 121,031,352.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,464,009.80 : 393,696,014.70 = 80,687,568.20 : x
  2. Step 2: Convert to fraction form
    262,464,009.80/393,696,014.70 = 80,687,568.20/x
  3. Step 3: Cross multiply
    262,464,009.80x = 393,696,014.70 × 80,687,568.20
  4. Step 4: Simplify right side
    262,464,009.80x = 31,766,374,036,174,452
  5. Step 5: Solve for x
    x = 31,766,374,036,174,452/262,464,009.80
  6. Step 6: Final answer
    x = 121,031,352.30

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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.