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Finding the Fourth Proportional to 223,264.51, 308,103.79 and 121,289.15

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Solution

The fourth proportional to 223,264.51, 308,103.79 and 121,289.15 is: 167,378.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,264.51 : 308,103.79 = 121,289.15 : x
  2. Step 2: Convert to fraction form
    223,264.51/308,103.79 = 121,289.15/x
  3. Step 3: Cross multiply
    223,264.51x = 308,103.79 × 121,289.15
  4. Step 4: Simplify right side
    223,264.51x = 37,369,646,800.88
  5. Step 5: Solve for x
    x = 37,369,646,800.88/223,264.51
  6. Step 6: Final answer
    x = 167,378.36

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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.