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Finding the Fourth Proportional to 57,728.40, 86,722.20 and 55,525.20

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Solution

The fourth proportional to 57,728.40, 86,722.20 and 55,525.20 is: 83,412.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,728.40 : 86,722.20 = 55,525.20 : x
  2. Step 2: Convert to fraction form
    57,728.40/86,722.20 = 55,525.20/x
  3. Step 3: Cross multiply
    57,728.40x = 86,722.20 × 55,525.20
  4. Step 4: Simplify right side
    57,728.40x = 4,815,267,499.44
  5. Step 5: Solve for x
    x = 4,815,267,499.44/57,728.40
  6. Step 6: Final answer
    x = 83,412.45

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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.