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Finding the Fourth Proportional to 81,885.75, 122,631.79 and 46,718.79

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Solution

The fourth proportional to 81,885.75, 122,631.79 and 46,718.79 is: 69,965.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,885.75 : 122,631.79 = 46,718.79 : x
  2. Step 2: Convert to fraction form
    81,885.75/122,631.79 = 46,718.79/x
  3. Step 3: Cross multiply
    81,885.75x = 122,631.79 × 46,718.79
  4. Step 4: Simplify right side
    81,885.75x = 5,729,207,997.58
  5. Step 5: Solve for x
    x = 5,729,207,997.58/81,885.75
  6. Step 6: Final answer
    x = 69,965.88

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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.