Home / 81,431,142.40-122,146,713.60-68,676,558.40

Finding the Fourth Proportional to 81,431,142.40, 122,146,713.60 and 68,676,558.40

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Solution

The fourth proportional to 81,431,142.40, 122,146,713.60 and 68,676,558.40 is: 103,014,837.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,431,142.40 : 122,146,713.60 = 68,676,558.40 : x
  2. Step 2: Convert to fraction form
    81,431,142.40/122,146,713.60 = 68,676,558.40/x
  3. Step 3: Cross multiply
    81,431,142.40x = 122,146,713.60 × 68,676,558.40
  4. Step 4: Simplify right side
    81,431,142.40x = 8,388,615,909,918,475
  5. Step 5: Solve for x
    x = 8,388,615,909,918,475/81,431,142.40
  6. Step 6: Final answer
    x = 103,014,837.60

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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.