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Finding the Fourth Proportional to 70,558.92, 105,810.71 and 28,431.14

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Solution

The fourth proportional to 70,558.92, 105,810.71 and 28,431.14 is: 42,635.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,558.92 : 105,810.71 = 28,431.14 : x
  2. Step 2: Convert to fraction form
    70,558.92/105,810.71 = 28,431.14/x
  3. Step 3: Cross multiply
    70,558.92x = 105,810.71 × 28,431.14
  4. Step 4: Simplify right side
    70,558.92x = 3,008,318,438.30
  5. Step 5: Solve for x
    x = 3,008,318,438.30/70,558.92
  6. Step 6: Final answer
    x = 42,635.55

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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.