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Finding the Fourth Proportional to 281,699.64, 388,748.57 and 154,372.50

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Solution

The fourth proportional to 281,699.64, 388,748.57 and 154,372.50 is: 213,035.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,699.64 : 388,748.57 = 154,372.50 : x
  2. Step 2: Convert to fraction form
    281,699.64/388,748.57 = 154,372.50/x
  3. Step 3: Cross multiply
    281,699.64x = 388,748.57 × 154,372.50
  4. Step 4: Simplify right side
    281,699.64x = 60,012,087,850.46
  5. Step 5: Solve for x
    x = 60,012,087,850.46/281,699.64
  6. Step 6: Final answer
    x = 213,035.73

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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.