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Finding the Fourth Proportional to 223,519.80, 308,460.35 and 128,026.41

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Solution

The fourth proportional to 223,519.80, 308,460.35 and 128,026.41 is: 176,678.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,519.80 : 308,460.35 = 128,026.41 : x
  2. Step 2: Convert to fraction form
    223,519.80/308,460.35 = 128,026.41/x
  3. Step 3: Cross multiply
    223,519.80x = 308,460.35 × 128,026.41
  4. Step 4: Simplify right side
    223,519.80x = 39,491,070,401.18
  5. Step 5: Solve for x
    x = 39,491,070,401.18/223,519.80
  6. Step 6: Final answer
    x = 176,678.17

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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.