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Finding the Fourth Proportional to 223,740.63, 308,775.86 and 128,261.69

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Solution

The fourth proportional to 223,740.63, 308,775.86 and 128,261.69 is: 177,009.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,740.63 : 308,775.86 = 128,261.69 : x
  2. Step 2: Convert to fraction form
    223,740.63/308,775.86 = 128,261.69/x
  3. Step 3: Cross multiply
    223,740.63x = 308,775.86 × 128,261.69
  4. Step 4: Simplify right side
    223,740.63x = 39,604,111,449.62
  5. Step 5: Solve for x
    x = 39,604,111,449.62/223,740.63
  6. Step 6: Final answer
    x = 177,009.03

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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.