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Finding the Fourth Proportional to 57,970.72, 79,980.42 and 40,059.28

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Solution

The fourth proportional to 57,970.72, 79,980.42 and 40,059.28 is: 55,268.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,970.72 : 79,980.42 = 40,059.28 : x
  2. Step 2: Convert to fraction form
    57,970.72/79,980.42 = 40,059.28/x
  3. Step 3: Cross multiply
    57,970.72x = 79,980.42 × 40,059.28
  4. Step 4: Simplify right side
    57,970.72x = 3,203,958,039.30
  5. Step 5: Solve for x
    x = 3,203,958,039.30/57,970.72
  6. Step 6: Final answer
    x = 55,268.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.