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Finding the Fourth Proportional to 69,842.76, 96,378.84 and 39,213.60

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Solution

The fourth proportional to 69,842.76, 96,378.84 and 39,213.60 is: 54,112.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,842.76 : 96,378.84 = 39,213.60 : x
  2. Step 2: Convert to fraction form
    69,842.76/96,378.84 = 39,213.60/x
  3. Step 3: Cross multiply
    69,842.76x = 96,378.84 × 39,213.60
  4. Step 4: Simplify right side
    69,842.76x = 3,779,361,280.22
  5. Step 5: Solve for x
    x = 3,779,361,280.22/69,842.76
  6. Step 6: Final answer
    x = 54,112.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.