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Finding the Fourth Proportional to 217,487.16, 300,112.14 and 121,975.44

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Solution

The fourth proportional to 217,487.16, 300,112.14 and 121,975.44 is: 168,314.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,487.16 : 300,112.14 = 121,975.44 : x
  2. Step 2: Convert to fraction form
    217,487.16/300,112.14 = 121,975.44/x
  3. Step 3: Cross multiply
    217,487.16x = 300,112.14 × 121,975.44
  4. Step 4: Simplify right side
    217,487.16x = 36,606,310,325.84
  5. Step 5: Solve for x
    x = 36,606,310,325.84/217,487.16
  6. Step 6: Final answer
    x = 168,314.81

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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.