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Finding the Fourth Proportional to 81,668.40, 112,720.20 and 58,759.44

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Solution

The fourth proportional to 81,668.40, 112,720.20 and 58,759.44 is: 81,100.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,668.40 : 112,720.20 = 58,759.44 : x
  2. Step 2: Convert to fraction form
    81,668.40/112,720.20 = 58,759.44/x
  3. Step 3: Cross multiply
    81,668.40x = 112,720.20 × 58,759.44
  4. Step 4: Simplify right side
    81,668.40x = 6,623,375,828.69
  5. Step 5: Solve for x
    x = 6,623,375,828.69/81,668.40
  6. Step 6: Final answer
    x = 81,100.84

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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.