Home / 80,841,137.40-121,279,420.80-39,920,180.40

Finding the Fourth Proportional to 80,841,137.40, 121,279,420.80 and 39,920,180.40

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Solution

The fourth proportional to 80,841,137.40, 121,279,420.80 and 39,920,180.40 is: 59,889,018.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,841,137.40 : 121,279,420.80 = 39,920,180.40 : x
  2. Step 2: Convert to fraction form
    80,841,137.40/121,279,420.80 = 39,920,180.40/x
  3. Step 3: Cross multiply
    80,841,137.40x = 121,279,420.80 × 39,920,180.40
  4. Step 4: Simplify right side
    80,841,137.40x = 4,841,496,357,143,512
  5. Step 5: Solve for x
    x = 4,841,496,357,143,512/80,841,137.40
  6. Step 6: Final answer
    x = 59,889,018.30

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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.