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Finding the Fourth Proportional to 154,181.68, 212,806.28 and 100,373

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Solution

The fourth proportional to 154,181.68, 212,806.28 and 100,373 is: 138,537.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,181.68 : 212,806.28 = 100,373 : x
  2. Step 2: Convert to fraction form
    154,181.68/212,806.28 = 100,373/x
  3. Step 3: Cross multiply
    154,181.68x = 212,806.28 × 100,373
  4. Step 4: Simplify right side
    154,181.68x = 21,360,004,742.44
  5. Step 5: Solve for x
    x = 21,360,004,742.44/154,181.68
  6. Step 6: Final answer
    x = 138,537.89

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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.