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Finding the Fourth Proportional to 81,586,654.80, 122,344,552.80 and 26,978,139.60

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Solution

The fourth proportional to 81,586,654.80, 122,344,552.80 and 26,978,139.60 is: 40,455,494.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,586,654.80 : 122,344,552.80 = 26,978,139.60 : x
  2. Step 2: Convert to fraction form
    81,586,654.80/122,344,552.80 = 26,978,139.60/x
  3. Step 3: Cross multiply
    81,586,654.80x = 122,344,552.80 × 26,978,139.60
  4. Step 4: Simplify right side
    81,586,654.80x = 3,300,628,424,737,971
  5. Step 5: Solve for x
    x = 3,300,628,424,737,971/81,586,654.80
  6. Step 6: Final answer
    x = 40,455,494.01

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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.