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Finding the Fourth Proportional to 223,521.80, 308,463.11 and 128,028.41

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Solution

The fourth proportional to 223,521.80, 308,463.11 and 128,028.41 is: 176,680.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,521.80 : 308,463.11 = 128,028.41 : x
  2. Step 2: Convert to fraction form
    223,521.80/308,463.11 = 128,028.41/x
  3. Step 3: Cross multiply
    223,521.80x = 308,463.11 × 128,028.41
  4. Step 4: Simplify right side
    223,521.80x = 39,492,041,516.96
  5. Step 5: Solve for x
    x = 39,492,041,516.96/223,521.80
  6. Step 6: Final answer
    x = 176,680.94

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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.