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Finding the Fourth Proportional to 57,991.20, 86,986.80 and 28,466.70

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Solution

The fourth proportional to 57,991.20, 86,986.80 and 28,466.70 is: 42,700.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,991.20 : 86,986.80 = 28,466.70 : x
  2. Step 2: Convert to fraction form
    57,991.20/86,986.80 = 28,466.70/x
  3. Step 3: Cross multiply
    57,991.20x = 86,986.80 × 28,466.70
  4. Step 4: Simplify right side
    57,991.20x = 2,476,227,139.56
  5. Step 5: Solve for x
    x = 2,476,227,139.56/57,991.20
  6. Step 6: Final answer
    x = 42,700.05

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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.