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Finding the Fourth Proportional to 570,511,321.80, 855,766,982.70 and 139,689,817.80

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Solution

The fourth proportional to 570,511,321.80, 855,766,982.70 and 139,689,817.80 is: 209,534,726.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,511,321.80 : 855,766,982.70 = 139,689,817.80 : x
  2. Step 2: Convert to fraction form
    570,511,321.80/855,766,982.70 = 139,689,817.80/x
  3. Step 3: Cross multiply
    570,511,321.80x = 855,766,982.70 × 139,689,817.80
  4. Step 4: Simplify right side
    570,511,321.80x = 119,541,933,892,618,768
  5. Step 5: Solve for x
    x = 119,541,933,892,618,768/570,511,321.80
  6. Step 6: Final answer
    x = 209,534,726.70

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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.