Home / 287,873,678.05-431,810,503.23-80,642,771.81

Finding the Fourth Proportional to 287,873,678.05, 431,810,503.23 and 80,642,771.81

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Solution

The fourth proportional to 287,873,678.05, 431,810,503.23 and 80,642,771.81 is: 120,964,153.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,873,678.05 : 431,810,503.23 = 80,642,771.81 : x
  2. Step 2: Convert to fraction form
    287,873,678.05/431,810,503.23 = 80,642,771.81/x
  3. Step 3: Cross multiply
    287,873,678.05x = 431,810,503.23 × 80,642,771.81
  4. Step 4: Simplify right side
    287,873,678.05x = 34,822,395,874,575,896
  5. Step 5: Solve for x
    x = 34,822,395,874,575,896/287,873,678.05
  6. Step 6: Final answer
    x = 120,964,153.83

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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.