Home / 81,955,961.40-122,933,942.10-77,253,036.60

Finding the Fourth Proportional to 81,955,961.40, 122,933,942.10 and 77,253,036.60

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Solution

The fourth proportional to 81,955,961.40, 122,933,942.10 and 77,253,036.60 is: 115,879,554.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,955,961.40 : 122,933,942.10 = 77,253,036.60 : x
  2. Step 2: Convert to fraction form
    81,955,961.40/122,933,942.10 = 77,253,036.60/x
  3. Step 3: Cross multiply
    81,955,961.40x = 122,933,942.10 × 77,253,036.60
  4. Step 4: Simplify right side
    81,955,961.40x = 9,497,020,328,433,580
  5. Step 5: Solve for x
    x = 9,497,020,328,433,580/81,955,961.40
  6. Step 6: Final answer
    x = 115,879,554.90

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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.