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Finding the Fourth Proportional to 121,773.14, 168,119.60 and 76,489.89

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Solution

The fourth proportional to 121,773.14, 168,119.60 and 76,489.89 is: 105,601.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,773.14 : 168,119.60 = 76,489.89 : x
  2. Step 2: Convert to fraction form
    121,773.14/168,119.60 = 76,489.89/x
  3. Step 3: Cross multiply
    121,773.14x = 168,119.60 × 76,489.89
  4. Step 4: Simplify right side
    121,773.14x = 12,859,449,128.20
  5. Step 5: Solve for x
    x = 12,859,449,128.20/121,773.14
  6. Step 6: Final answer
    x = 105,601.69

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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.