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Finding the Fourth Proportional to 103,142.39, 154,713.72 and 28,263.20

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Solution

The fourth proportional to 103,142.39, 154,713.72 and 28,263.20 is: 42,394.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,142.39 : 154,713.72 = 28,263.20 : x
  2. Step 2: Convert to fraction form
    103,142.39/154,713.72 = 28,263.20/x
  3. Step 3: Cross multiply
    103,142.39x = 154,713.72 × 28,263.20
  4. Step 4: Simplify right side
    103,142.39x = 4,372,704,811.10
  5. Step 5: Solve for x
    x = 4,372,704,811.10/103,142.39
  6. Step 6: Final answer
    x = 42,394.84

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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.