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Finding the Fourth Proportional to 73,015.40, 109,442.10 and 28,627.40

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Solution

The fourth proportional to 73,015.40, 109,442.10 and 28,627.40 is: 42,909.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,015.40 : 109,442.10 = 28,627.40 : x
  2. Step 2: Convert to fraction form
    73,015.40/109,442.10 = 28,627.40/x
  3. Step 3: Cross multiply
    73,015.40x = 109,442.10 × 28,627.40
  4. Step 4: Simplify right side
    73,015.40x = 3,133,042,773.54
  5. Step 5: Solve for x
    x = 3,133,042,773.54/73,015.40
  6. Step 6: Final answer
    x = 42,909.34

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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.