Home / 155,052,540.78-213,977,070.44-85,442,405.65

Finding the Fourth Proportional to 155,052,540.78, 213,977,070.44 and 85,442,405.65

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Solution

The fourth proportional to 155,052,540.78, 213,977,070.44 and 85,442,405.65 is: 117,913,034.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,052,540.78 : 213,977,070.44 = 85,442,405.65 : x
  2. Step 2: Convert to fraction form
    155,052,540.78/213,977,070.44 = 85,442,405.65/x
  3. Step 3: Cross multiply
    155,052,540.78x = 213,977,070.44 × 85,442,405.65
  4. Step 4: Simplify right side
    155,052,540.78x = 18,282,715,652,333,104
  5. Step 5: Solve for x
    x = 18,282,715,652,333,104/155,052,540.78
  6. Step 6: Final answer
    x = 117,913,034.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.