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Finding the Fourth Proportional to 103,310.82, 154,966.11 and 28,431.36

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Solution

The fourth proportional to 103,310.82, 154,966.11 and 28,431.36 is: 42,647.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,310.82 : 154,966.11 = 28,431.36 : x
  2. Step 2: Convert to fraction form
    103,310.82/154,966.11 = 28,431.36/x
  3. Step 3: Cross multiply
    103,310.82x = 154,966.11 × 28,431.36
  4. Step 4: Simplify right side
    103,310.82x = 4,405,897,261.21
  5. Step 5: Solve for x
    x = 4,405,897,261.21/103,310.82
  6. Step 6: Final answer
    x = 42,647.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.