Home / 80,841,138.40-121,279,422.30-39,920,181.40

Finding the Fourth Proportional to 80,841,138.40, 121,279,422.30 and 39,920,181.40

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Solution

The fourth proportional to 80,841,138.40, 121,279,422.30 and 39,920,181.40 is: 59,889,019.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,841,138.40 : 121,279,422.30 = 39,920,181.40 : x
  2. Step 2: Convert to fraction form
    80,841,138.40/121,279,422.30 = 39,920,181.40/x
  3. Step 3: Cross multiply
    80,841,138.40x = 121,279,422.30 × 39,920,181.40
  4. Step 4: Simplify right side
    80,841,138.40x = 4,841,496,538,303,205
  5. Step 5: Solve for x
    x = 4,841,496,538,303,205/80,841,138.40
  6. Step 6: Final answer
    x = 59,889,019.80

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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.