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Finding the Fourth Proportional to 223,813.92, 308,904.66 and 128,321.40

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Solution

The fourth proportional to 223,813.92, 308,904.66 and 128,321.40 is: 177,107.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,813.92 : 308,904.66 = 128,321.40 : x
  2. Step 2: Convert to fraction form
    223,813.92/308,904.66 = 128,321.40/x
  3. Step 3: Cross multiply
    223,813.92x = 308,904.66 × 128,321.40
  4. Step 4: Simplify right side
    223,813.92x = 39,639,078,437.72
  5. Step 5: Solve for x
    x = 39,639,078,437.72/223,813.92
  6. Step 6: Final answer
    x = 177,107.30

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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.