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Finding the Fourth Proportional to 261,885.38, 361,445.63 and 154,481.81

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Solution

The fourth proportional to 261,885.38, 361,445.63 and 154,481.81 is: 213,210.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,885.38 : 361,445.63 = 154,481.81 : x
  2. Step 2: Convert to fraction form
    261,885.38/361,445.63 = 154,481.81/x
  3. Step 3: Cross multiply
    261,885.38x = 361,445.63 × 154,481.81
  4. Step 4: Simplify right side
    261,885.38x = 55,836,772,559.35
  5. Step 5: Solve for x
    x = 55,836,772,559.35/261,885.38
  6. Step 6: Final answer
    x = 213,210.73

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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.