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Finding the Fourth Proportional to 140,908,811.20, 211,363,216.80 and 140,908,811.20

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Solution

The fourth proportional to 140,908,811.20, 211,363,216.80 and 140,908,811.20 is: 211,363,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,908,811.20 : 211,363,216.80 = 140,908,811.20 : x
  2. Step 2: Convert to fraction form
    140,908,811.20/211,363,216.80 = 140,908,811.20/x
  3. Step 3: Cross multiply
    140,908,811.20x = 211,363,216.80 × 140,908,811.20
  4. Step 4: Simplify right side
    140,908,811.20x = 29,782,939,610,695,868
  5. Step 5: Solve for x
    x = 29,782,939,610,695,868/140,908,811.20
  6. Step 6: Final answer
    x = 211,363,216.80

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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.