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Finding the Fourth Proportional to 223,641.05, 308,630.39 and 121,672.17

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Solution

The fourth proportional to 223,641.05, 308,630.39 and 121,672.17 is: 167,910.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,641.05 : 308,630.39 = 121,672.17 : x
  2. Step 2: Convert to fraction form
    223,641.05/308,630.39 = 121,672.17/x
  3. Step 3: Cross multiply
    223,641.05x = 308,630.39 × 121,672.17
  4. Step 4: Simplify right side
    223,641.05x = 37,551,728,670.89
  5. Step 5: Solve for x
    x = 37,551,728,670.89/223,641.05
  6. Step 6: Final answer
    x = 167,910.72

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1.5x scale

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.