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Finding the Fourth Proportional to 57,079.59, 85,619.39 and 19,640.58

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Solution

The fourth proportional to 57,079.59, 85,619.39 and 19,640.58 is: 29,460.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,079.59 : 85,619.39 = 19,640.58 : x
  2. Step 2: Convert to fraction form
    57,079.59/85,619.39 = 19,640.58/x
  3. Step 3: Cross multiply
    57,079.59x = 85,619.39 × 19,640.58
  4. Step 4: Simplify right side
    57,079.59x = 1,681,614,478.85
  5. Step 5: Solve for x
    x = 1,681,614,478.85/57,079.59
  6. Step 6: Final answer
    x = 29,460.87

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1.5x scale

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.