Home / 81,919,245.32-122,780,890.36-38,140,987.40

Finding the Fourth Proportional to 81,919,245.32, 122,780,890.36 and 38,140,987.40

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Solution

The fourth proportional to 81,919,245.32, 122,780,890.36 and 38,140,987.40 is: 57,165,863.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,919,245.32 : 122,780,890.36 = 38,140,987.40 : x
  2. Step 2: Convert to fraction form
    81,919,245.32/122,780,890.36 = 38,140,987.40/x
  3. Step 3: Cross multiply
    81,919,245.32x = 122,780,890.36 × 38,140,987.40
  4. Step 4: Simplify right side
    81,919,245.32x = 4,682,984,392,181,541
  5. Step 5: Solve for x
    x = 4,682,984,392,181,541/81,919,245.32
  6. Step 6: Final answer
    x = 57,165,863.45

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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.