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Finding the Fourth Proportional to 60,739.66, 83,782.79 and 39,221.20

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Solution

The fourth proportional to 60,739.66, 83,782.79 and 39,221.20 is: 54,100.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,739.66 : 83,782.79 = 39,221.20 : x
  2. Step 2: Convert to fraction form
    60,739.66/83,782.79 = 39,221.20/x
  3. Step 3: Cross multiply
    60,739.66x = 83,782.79 × 39,221.20
  4. Step 4: Simplify right side
    60,739.66x = 3,286,061,367.04
  5. Step 5: Solve for x
    x = 3,286,061,367.04/60,739.66
  6. Step 6: Final answer
    x = 54,100.75

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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.