Home / 128,414,763.60-192,622,145.40-82,498,261.20

Finding the Fourth Proportional to 128,414,763.60, 192,622,145.40 and 82,498,261.20

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Solution

The fourth proportional to 128,414,763.60, 192,622,145.40 and 82,498,261.20 is: 123,747,391.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,414,763.60 : 192,622,145.40 = 82,498,261.20 : x
  2. Step 2: Convert to fraction form
    128,414,763.60/192,622,145.40 = 82,498,261.20/x
  3. Step 3: Cross multiply
    128,414,763.60x = 192,622,145.40 × 82,498,261.20
  4. Step 4: Simplify right side
    128,414,763.60x = 15,890,992,064,113,580
  5. Step 5: Solve for x
    x = 15,890,992,064,113,580/128,414,763.60
  6. Step 6: Final answer
    x = 123,747,391.80

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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.