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Finding the Fourth Proportional to 85,977.95, 128,925.43 and 36,044.64

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Solution

The fourth proportional to 85,977.95, 128,925.43 and 36,044.64 is: 54,049.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,977.95 : 128,925.43 = 36,044.64 : x
  2. Step 2: Convert to fraction form
    85,977.95/128,925.43 = 36,044.64/x
  3. Step 3: Cross multiply
    85,977.95x = 128,925.43 × 36,044.64
  4. Step 4: Simplify right side
    85,977.95x = 4,647,070,783.87
  5. Step 5: Solve for x
    x = 4,647,070,783.87/85,977.95
  6. Step 6: Final answer
    x = 54,049.56

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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.