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Finding the Fourth Proportional to 128,446.26, 177,291.46 and 74,741.68

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Solution

The fourth proportional to 128,446.26, 177,291.46 and 74,741.68 is: 103,164.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,446.26 : 177,291.46 = 74,741.68 : x
  2. Step 2: Convert to fraction form
    128,446.26/177,291.46 = 74,741.68/x
  3. Step 3: Cross multiply
    128,446.26x = 177,291.46 × 74,741.68
  4. Step 4: Simplify right side
    128,446.26x = 13,251,061,570.05
  5. Step 5: Solve for x
    x = 13,251,061,570.05/128,446.26
  6. Step 6: Final answer
    x = 103,164.25

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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.