Home / 231,384.72-319,309.99-129,409.77

Finding the Fourth Proportional to 231,384.72, 319,309.99 and 129,409.77

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Solution

The fourth proportional to 231,384.72, 319,309.99 and 129,409.77 is: 178,584.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,384.72 : 319,309.99 = 129,409.77 : x
  2. Step 2: Convert to fraction form
    231,384.72/319,309.99 = 129,409.77/x
  3. Step 3: Cross multiply
    231,384.72x = 319,309.99 × 129,409.77
  4. Step 4: Simplify right side
    231,384.72x = 41,321,832,364.60
  5. Step 5: Solve for x
    x = 41,321,832,364.60/231,384.72
  6. Step 6: Final answer
    x = 178,584.97

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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.