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Finding the Fourth Proportional to 121,766.64, 168,144.84 and 76,523.01

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Solution

The fourth proportional to 121,766.64, 168,144.84 and 76,523.01 is: 105,668.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,766.64 : 168,144.84 = 76,523.01 : x
  2. Step 2: Convert to fraction form
    121,766.64/168,144.84 = 76,523.01/x
  3. Step 3: Cross multiply
    121,766.64x = 168,144.84 × 76,523.01
  4. Step 4: Simplify right side
    121,766.64x = 12,866,949,272.77
  5. Step 5: Solve for x
    x = 12,866,949,272.77/121,766.64
  6. Step 6: Final answer
    x = 105,668.92

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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.