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Finding the Fourth Proportional to 81,470.48, 122,220.30 and 53,447.72

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Solution

The fourth proportional to 81,470.48, 122,220.30 and 53,447.72 is: 80,181.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,470.48 : 122,220.30 = 53,447.72 : x
  2. Step 2: Convert to fraction form
    81,470.48/122,220.30 = 53,447.72/x
  3. Step 3: Cross multiply
    81,470.48x = 122,220.30 × 53,447.72
  4. Step 4: Simplify right side
    81,470.48x = 6,532,396,372.72
  5. Step 5: Solve for x
    x = 6,532,396,372.72/81,470.48
  6. Step 6: Final answer
    x = 80,181.15

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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.