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Finding the Fourth Proportional to 231,930.76, 320,079.72 and 129,950.68

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Solution

The fourth proportional to 231,930.76, 320,079.72 and 129,950.68 is: 179,340.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,930.76 : 320,079.72 = 129,950.68 : x
  2. Step 2: Convert to fraction form
    231,930.76/320,079.72 = 129,950.68/x
  3. Step 3: Cross multiply
    231,930.76x = 320,079.72 × 129,950.68
  4. Step 4: Simplify right side
    231,930.76x = 41,594,577,268.21
  5. Step 5: Solve for x
    x = 41,594,577,268.21/231,930.76
  6. Step 6: Final answer
    x = 179,340.49

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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.