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Finding the Fourth Proportional to 57,935.96, 79,987.74 and 39,817.88

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Solution

The fourth proportional to 57,935.96, 79,987.74 and 39,817.88 is: 54,973.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,935.96 : 79,987.74 = 39,817.88 : x
  2. Step 2: Convert to fraction form
    57,935.96/79,987.74 = 39,817.88/x
  3. Step 3: Cross multiply
    57,935.96x = 79,987.74 × 39,817.88
  4. Step 4: Simplify right side
    57,935.96x = 3,184,942,232.79
  5. Step 5: Solve for x
    x = 3,184,942,232.79/57,935.96
  6. Step 6: Final answer
    x = 54,973.50

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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.