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Finding the Fourth Proportional to 231,168.69, 318,980.70 and 129,181.32

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Solution

The fourth proportional to 231,168.69, 318,980.70 and 129,181.32 is: 178,252.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,168.69 : 318,980.70 = 129,181.32 : x
  2. Step 2: Convert to fraction form
    231,168.69/318,980.70 = 129,181.32/x
  3. Step 3: Cross multiply
    231,168.69x = 318,980.70 × 129,181.32
  4. Step 4: Simplify right side
    231,168.69x = 41,206,347,880.52
  5. Step 5: Solve for x
    x = 41,206,347,880.52/231,168.69
  6. Step 6: Final answer
    x = 178,252.29

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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.