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Finding the Fourth Proportional to 223,706.42, 308,728.15 and 128,219.29

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Solution

The fourth proportional to 223,706.42, 308,728.15 and 128,219.29 is: 176,950.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,706.42 : 308,728.15 = 128,219.29 : x
  2. Step 2: Convert to fraction form
    223,706.42/308,728.15 = 128,219.29/x
  3. Step 3: Cross multiply
    223,706.42x = 308,728.15 × 128,219.29
  4. Step 4: Simplify right side
    223,706.42x = 39,584,904,196.01
  5. Step 5: Solve for x
    x = 39,584,904,196.01/223,706.42
  6. Step 6: Final answer
    x = 176,950.24

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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.