Home / 82,021,320.80-123,043,040.40-28,185,135.20

Finding the Fourth Proportional to 82,021,320.80, 123,043,040.40 and 28,185,135.20

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Solution

The fourth proportional to 82,021,320.80, 123,043,040.40 and 28,185,135.20 is: 42,281,503.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,021,320.80 : 123,043,040.40 = 28,185,135.20 : x
  2. Step 2: Convert to fraction form
    82,021,320.80/123,043,040.40 = 28,185,135.20/x
  3. Step 3: Cross multiply
    82,021,320.80x = 123,043,040.40 × 28,185,135.20
  4. Step 4: Simplify right side
    82,021,320.80x = 3,467,984,729,093,062
  5. Step 5: Solve for x
    x = 3,467,984,729,093,062/82,021,320.80
  6. Step 6: Final answer
    x = 42,281,503.09

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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.