Home / 57,420.42-86,078.73-20,475.78

Finding the Fourth Proportional to 57,420.42, 86,078.73 and 20,475.78

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Solution

The fourth proportional to 57,420.42, 86,078.73 and 20,475.78 is: 30,695.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,420.42 : 86,078.73 = 20,475.78 : x
  2. Step 2: Convert to fraction form
    57,420.42/86,078.73 = 20,475.78/x
  3. Step 3: Cross multiply
    57,420.42x = 86,078.73 × 20,475.78
  4. Step 4: Simplify right side
    57,420.42x = 1,762,529,138.16
  5. Step 5: Solve for x
    x = 1,762,529,138.16/57,420.42
  6. Step 6: Final answer
    x = 30,695.16

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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.