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Finding the Fourth Proportional to 221,961.93, 306,302.85 and 121,359.93

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Solution

The fourth proportional to 221,961.93, 306,302.85 and 121,359.93 is: 167,474.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,961.93 : 306,302.85 = 121,359.93 : x
  2. Step 2: Convert to fraction form
    221,961.93/306,302.85 = 121,359.93/x
  3. Step 3: Cross multiply
    221,961.93x = 306,302.85 × 121,359.93
  4. Step 4: Simplify right side
    221,961.93x = 37,172,892,434.80
  5. Step 5: Solve for x
    x = 37,172,892,434.80/221,961.93
  6. Step 6: Final answer
    x = 167,474.18

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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.