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Finding the Fourth Proportional to 235,451.62, 324,914.28 and 128,021.74

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Solution

The fourth proportional to 235,451.62, 324,914.28 and 128,021.74 is: 176,665.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,451.62 : 324,914.28 = 128,021.74 : x
  2. Step 2: Convert to fraction form
    235,451.62/324,914.28 = 128,021.74/x
  3. Step 3: Cross multiply
    235,451.62x = 324,914.28 × 128,021.74
  4. Step 4: Simplify right side
    235,451.62x = 41,596,091,476.45
  5. Step 5: Solve for x
    x = 41,596,091,476.45/235,451.62
  6. Step 6: Final answer
    x = 176,665.13

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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.