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Finding the Fourth Proportional to 57,686, 79,534.56 and 48,139.64

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Solution

The fourth proportional to 57,686, 79,534.56 and 48,139.64 is: 66,372.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,686 : 79,534.56 = 48,139.64 : x
  2. Step 2: Convert to fraction form
    57,686/79,534.56 = 48,139.64/x
  3. Step 3: Cross multiply
    57,686x = 79,534.56 × 48,139.64
  4. Step 4: Simplify right side
    57,686x = 3,828,765,085.96
  5. Step 5: Solve for x
    x = 3,828,765,085.96/57,686
  6. Step 6: Final answer
    x = 66,372.52

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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.