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Finding the Fourth Proportional to 223,721.79, 308,737.10 and 128,234.07

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Solution

The fourth proportional to 223,721.79, 308,737.10 and 128,234.07 is: 176,963.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,721.79 : 308,737.10 = 128,234.07 : x
  2. Step 2: Convert to fraction form
    223,721.79/308,737.10 = 128,234.07/x
  3. Step 3: Cross multiply
    223,721.79x = 308,737.10 × 128,234.07
  4. Step 4: Simplify right side
    223,721.79x = 39,590,614,251.83
  5. Step 5: Solve for x
    x = 39,590,614,251.83/223,721.79
  6. Step 6: Final answer
    x = 176,963.60

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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.