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Finding the Fourth Proportional to 207,856,319.60, 311,784,479.40 and 64,263,666.80

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Solution

The fourth proportional to 207,856,319.60, 311,784,479.40 and 64,263,666.80 is: 96,395,500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,856,319.60 : 311,784,479.40 = 64,263,666.80 : x
  2. Step 2: Convert to fraction form
    207,856,319.60/311,784,479.40 = 64,263,666.80/x
  3. Step 3: Cross multiply
    207,856,319.60x = 311,784,479.40 × 64,263,666.80
  4. Step 4: Simplify right side
    207,856,319.60x = 20,036,413,897,573,060
  5. Step 5: Solve for x
    x = 20,036,413,897,573,060/207,856,319.60
  6. Step 6: Final answer
    x = 96,395,500.20

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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.