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Finding the Fourth Proportional to 223,630.48, 308,654.12 and 128,201.20

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Solution

The fourth proportional to 223,630.48, 308,654.12 and 128,201.20 is: 176,942.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,630.48 : 308,654.12 = 128,201.20 : x
  2. Step 2: Convert to fraction form
    223,630.48/308,654.12 = 128,201.20/x
  3. Step 3: Cross multiply
    223,630.48x = 308,654.12 × 128,201.20
  4. Step 4: Simplify right side
    223,630.48x = 39,569,828,568.94
  5. Step 5: Solve for x
    x = 39,569,828,568.94/223,630.48
  6. Step 6: Final answer
    x = 176,942.91

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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.