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Finding the Fourth Proportional to 312,121.49, 430,724.59 and 168,878.39

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Solution

The fourth proportional to 312,121.49, 430,724.59 and 168,878.39 is: 233,050.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,121.49 : 430,724.59 = 168,878.39 : x
  2. Step 2: Convert to fraction form
    312,121.49/430,724.59 = 168,878.39/x
  3. Step 3: Cross multiply
    312,121.49x = 430,724.59 × 168,878.39
  4. Step 4: Simplify right side
    312,121.49x = 72,740,072,716.79
  5. Step 5: Solve for x
    x = 72,740,072,716.79/312,121.49
  6. Step 6: Final answer
    x = 233,050.51

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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.