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Finding the Fourth Proportional to 54,780.20, 76,847.80 and 54,780.20

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Solution

The fourth proportional to 54,780.20, 76,847.80 and 54,780.20 is: 76,847.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,780.20 : 76,847.80 = 54,780.20 : x
  2. Step 2: Convert to fraction form
    54,780.20/76,847.80 = 54,780.20/x
  3. Step 3: Cross multiply
    54,780.20x = 76,847.80 × 54,780.20
  4. Step 4: Simplify right side
    54,780.20x = 4,209,737,853.56
  5. Step 5: Solve for x
    x = 4,209,737,853.56/54,780.20
  6. Step 6: Final answer
    x = 76,847.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.