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Finding the Fourth Proportional to 570,511,291.80, 855,766,937.70 and 139,689,787.80

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Solution

The fourth proportional to 570,511,291.80, 855,766,937.70 and 139,689,787.80 is: 209,534,681.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,511,291.80 : 855,766,937.70 = 139,689,787.80 : x
  2. Step 2: Convert to fraction form
    570,511,291.80/855,766,937.70 = 139,689,787.80/x
  3. Step 3: Cross multiply
    570,511,291.80x = 855,766,937.70 × 139,689,787.80
  4. Step 4: Simplify right side
    570,511,291.80x = 119,541,901,933,568,832
  5. Step 5: Solve for x
    x = 119,541,901,933,568,832/570,511,291.80
  6. Step 6: Final answer
    x = 209,534,681.70

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Double scale
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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.