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Finding the Fourth Proportional to 85,840.94, 128,789.42 and 41,472.78

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Solution

The fourth proportional to 85,840.94, 128,789.42 and 41,472.78 is: 62,222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840.94 : 128,789.42 = 41,472.78 : x
  2. Step 2: Convert to fraction form
    85,840.94/128,789.42 = 41,472.78/x
  3. Step 3: Cross multiply
    85,840.94x = 128,789.42 × 41,472.78
  4. Step 4: Simplify right side
    85,840.94x = 5,341,255,074.62
  5. Step 5: Solve for x
    x = 5,341,255,074.62/85,840.94
  6. Step 6: Final answer
    x = 62,222.70

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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.