Home / 128,321,764.80-192,482,647.20-77,303,428.80

Finding the Fourth Proportional to 128,321,764.80, 192,482,647.20 and 77,303,428.80

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Solution

The fourth proportional to 128,321,764.80, 192,482,647.20 and 77,303,428.80 is: 115,955,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,321,764.80 : 192,482,647.20 = 77,303,428.80 : x
  2. Step 2: Convert to fraction form
    128,321,764.80/192,482,647.20 = 77,303,428.80/x
  3. Step 3: Cross multiply
    128,321,764.80x = 192,482,647.20 × 77,303,428.80
  4. Step 4: Simplify right side
    128,321,764.80x = 14,879,568,613,060,718
  5. Step 5: Solve for x
    x = 14,879,568,613,060,718/128,321,764.80
  6. Step 6: Final answer
    x = 115,955,143.20

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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.