Home / 128,321,765.80-192,482,648.70-77,303,429.80

Finding the Fourth Proportional to 128,321,765.80, 192,482,648.70 and 77,303,429.80

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Solution

The fourth proportional to 128,321,765.80, 192,482,648.70 and 77,303,429.80 is: 115,955,144.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,321,765.80 : 192,482,648.70 = 77,303,429.80 : x
  2. Step 2: Convert to fraction form
    128,321,765.80/192,482,648.70 = 77,303,429.80/x
  3. Step 3: Cross multiply
    128,321,765.80x = 192,482,648.70 × 77,303,429.80
  4. Step 4: Simplify right side
    128,321,765.80x = 14,879,568,921,498,510
  5. Step 5: Solve for x
    x = 14,879,568,921,498,510/128,321,765.80
  6. Step 6: Final answer
    x = 115,955,144.70

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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.