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Finding the Fourth Proportional to 57,372.51, 79,173.88 and 31,878.77

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Solution

The fourth proportional to 57,372.51, 79,173.88 and 31,878.77 is: 43,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,372.51 : 79,173.88 = 31,878.77 : x
  2. Step 2: Convert to fraction form
    57,372.51/79,173.88 = 31,878.77/x
  3. Step 3: Cross multiply
    57,372.51x = 79,173.88 × 31,878.77
  4. Step 4: Simplify right side
    57,372.51x = 2,523,966,028.77
  5. Step 5: Solve for x
    x = 2,523,966,028.77/57,372.51
  6. Step 6: Final answer
    x = 43,992.60

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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.