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Finding the Fourth Proportional to 25,668,016.80, 38,502,025.20 and 20,629,168.80

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Solution

The fourth proportional to 25,668,016.80, 38,502,025.20 and 20,629,168.80 is: 30,943,753.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,668,016.80 : 38,502,025.20 = 20,629,168.80 : x
  2. Step 2: Convert to fraction form
    25,668,016.80/38,502,025.20 = 20,629,168.80/x
  3. Step 3: Cross multiply
    25,668,016.80x = 38,502,025.20 × 20,629,168.80
  4. Step 4: Simplify right side
    25,668,016.80x = 794,264,776,992,653.88
  5. Step 5: Solve for x
    x = 794,264,776,992,653.88/25,668,016.80
  6. Step 6: Final answer
    x = 30,943,753.20

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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.