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Finding the Fourth Proportional to 81,370.56, 122,055.87 and 39,242.79

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Solution

The fourth proportional to 81,370.56, 122,055.87 and 39,242.79 is: 58,864.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,370.56 : 122,055.87 = 39,242.79 : x
  2. Step 2: Convert to fraction form
    81,370.56/122,055.87 = 39,242.79/x
  3. Step 3: Cross multiply
    81,370.56x = 122,055.87 × 39,242.79
  4. Step 4: Simplify right side
    81,370.56x = 4,789,812,874.68
  5. Step 5: Solve for x
    x = 4,789,812,874.68/81,370.56
  6. Step 6: Final answer
    x = 58,864.20

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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.