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Finding the Fourth Proportional to 223,642.05, 308,631.77 and 121,673.17

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Solution

The fourth proportional to 223,642.05, 308,631.77 and 121,673.17 is: 167,912.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,642.05 : 308,631.77 = 121,673.17 : x
  2. Step 2: Convert to fraction form
    223,642.05/308,631.77 = 121,673.17/x
  3. Step 3: Cross multiply
    223,642.05x = 308,631.77 × 121,673.17
  4. Step 4: Simplify right side
    223,642.05x = 37,552,205,818.61
  5. Step 5: Solve for x
    x = 37,552,205,818.61/223,642.05
  6. Step 6: Final answer
    x = 167,912.10

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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.