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Finding the Fourth Proportional to 312,179.39, 430,807.53 and 168,939.43

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Solution

The fourth proportional to 312,179.39, 430,807.53 and 168,939.43 is: 233,136.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,179.39 : 430,807.53 = 168,939.43 : x
  2. Step 2: Convert to fraction form
    312,179.39/430,807.53 = 168,939.43/x
  3. Step 3: Cross multiply
    312,179.39x = 430,807.53 × 168,939.43
  4. Step 4: Simplify right side
    312,179.39x = 72,780,377,480.89
  5. Step 5: Solve for x
    x = 72,780,377,480.89/312,179.39
  6. Step 6: Final answer
    x = 233,136.39

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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.