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Finding the Fourth Proportional to 55,147.60, 82,721.40 and 28,860.40

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Solution

The fourth proportional to 55,147.60, 82,721.40 and 28,860.40 is: 43,290.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,147.60 : 82,721.40 = 28,860.40 : x
  2. Step 2: Convert to fraction form
    55,147.60/82,721.40 = 28,860.40/x
  3. Step 3: Cross multiply
    55,147.60x = 82,721.40 × 28,860.40
  4. Step 4: Simplify right side
    55,147.60x = 2,387,372,692.56
  5. Step 5: Solve for x
    x = 2,387,372,692.56/55,147.60
  6. Step 6: Final answer
    x = 43,290.60

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1.5x scale

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.