Home / 128,105,813.20-192,158,719.80-121,835,246.80

Finding the Fourth Proportional to 128,105,813.20, 192,158,719.80 and 121,835,246.80

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Solution

The fourth proportional to 128,105,813.20, 192,158,719.80 and 121,835,246.80 is: 182,752,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,105,813.20 : 192,158,719.80 = 121,835,246.80 : x
  2. Step 2: Convert to fraction form
    128,105,813.20/192,158,719.80 = 121,835,246.80/x
  3. Step 3: Cross multiply
    128,105,813.20x = 192,158,719.80 × 121,835,246.80
  4. Step 4: Simplify right side
    128,105,813.20x = 23,411,705,051,605,048
  5. Step 5: Solve for x
    x = 23,411,705,051,605,048/128,105,813.20
  6. Step 6: Final answer
    x = 182,752,870.20

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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.