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Finding the Fourth Proportional to 85,497.86, 128,224.82 and 40,474.82

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Solution

The fourth proportional to 85,497.86, 128,224.82 and 40,474.82 is: 60,701.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,497.86 : 128,224.82 = 40,474.82 : x
  2. Step 2: Convert to fraction form
    85,497.86/128,224.82 = 40,474.82/x
  3. Step 3: Cross multiply
    85,497.86x = 128,224.82 × 40,474.82
  4. Step 4: Simplify right side
    85,497.86x = 5,189,876,930.78
  5. Step 5: Solve for x
    x = 5,189,876,930.78/85,497.86
  6. Step 6: Final answer
    x = 60,701.83

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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.