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Finding the Fourth Proportional to 223,328.64, 308,199.36 and 122,729.28

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Solution

The fourth proportional to 223,328.64, 308,199.36 and 122,729.28 is: 169,369.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,328.64 : 308,199.36 = 122,729.28 : x
  2. Step 2: Convert to fraction form
    223,328.64/308,199.36 = 122,729.28/x
  3. Step 3: Cross multiply
    223,328.64x = 308,199.36 × 122,729.28
  4. Step 4: Simplify right side
    223,328.64x = 37,825,085,549.26
  5. Step 5: Solve for x
    x = 37,825,085,549.26/223,328.64
  6. Step 6: Final answer
    x = 169,369.61

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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.