Home / 279,936,021.80-419,904,032.70-85,845,895.40

Finding the Fourth Proportional to 279,936,021.80, 419,904,032.70 and 85,845,895.40

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Solution

The fourth proportional to 279,936,021.80, 419,904,032.70 and 85,845,895.40 is: 128,768,843.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,021.80 : 419,904,032.70 = 85,845,895.40 : x
  2. Step 2: Convert to fraction form
    279,936,021.80/419,904,032.70 = 85,845,895.40/x
  3. Step 3: Cross multiply
    279,936,021.80x = 419,904,032.70 × 85,845,895.40
  4. Step 4: Simplify right side
    279,936,021.80x = 36,047,037,669,202,384
  5. Step 5: Solve for x
    x = 36,047,037,669,202,384/279,936,021.80
  6. Step 6: Final answer
    x = 128,768,843.10

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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.