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Finding the Fourth Proportional to 121,318,698.10, 181,978,047.15 and 80,504,029.30

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Solution

The fourth proportional to 121,318,698.10, 181,978,047.15 and 80,504,029.30 is: 120,756,043.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,318,698.10 : 181,978,047.15 = 80,504,029.30 : x
  2. Step 2: Convert to fraction form
    121,318,698.10/181,978,047.15 = 80,504,029.30/x
  3. Step 3: Cross multiply
    121,318,698.10x = 181,978,047.15 × 80,504,029.30
  4. Step 4: Simplify right side
    121,318,698.10x = 14,649,966,039,720,382
  5. Step 5: Solve for x
    x = 14,649,966,039,720,382/121,318,698.10
  6. Step 6: Final answer
    x = 120,756,043.95

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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.