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Finding the Fourth Proportional to 81,668.40, 112,695.48 and 45,855.60

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Solution

The fourth proportional to 81,668.40, 112,695.48 and 45,855.60 is: 63,276.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,668.40 : 112,695.48 = 45,855.60 : x
  2. Step 2: Convert to fraction form
    81,668.40/112,695.48 = 45,855.60/x
  3. Step 3: Cross multiply
    81,668.40x = 112,695.48 × 45,855.60
  4. Step 4: Simplify right side
    81,668.40x = 5,167,718,852.69
  5. Step 5: Solve for x
    x = 5,167,718,852.69/81,668.40
  6. Step 6: Final answer
    x = 63,276.85

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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.