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Finding the Fourth Proportional to 57,078.95, 85,597.13 and 19,628.42

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Solution

The fourth proportional to 57,078.95, 85,597.13 and 19,628.42 is: 29,435.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,078.95 : 85,597.13 = 19,628.42 : x
  2. Step 2: Convert to fraction form
    57,078.95/85,597.13 = 19,628.42/x
  3. Step 3: Cross multiply
    57,078.95x = 85,597.13 × 19,628.42
  4. Step 4: Simplify right side
    57,078.95x = 1,680,136,039.52
  5. Step 5: Solve for x
    x = 1,680,136,039.52/57,078.95
  6. Step 6: Final answer
    x = 29,435.30

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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.