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Finding the Fourth Proportional to 26,571,985.80, 39,857,978.70 and 20,147,454.60

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Solution

The fourth proportional to 26,571,985.80, 39,857,978.70 and 20,147,454.60 is: 30,221,181.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,571,985.80 : 39,857,978.70 = 20,147,454.60 : x
  2. Step 2: Convert to fraction form
    26,571,985.80/39,857,978.70 = 20,147,454.60/x
  3. Step 3: Cross multiply
    26,571,985.80x = 39,857,978.70 × 20,147,454.60
  4. Step 4: Simplify right side
    26,571,985.80x = 803,036,816,306,017.12
  5. Step 5: Solve for x
    x = 803,036,816,306,017.12/26,571,985.80
  6. Step 6: Final answer
    x = 30,221,181.90

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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.