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Finding the Fourth Proportional to 70,527.30, 105,789.82 and 28,406.38

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Solution

The fourth proportional to 70,527.30, 105,789.82 and 28,406.38 is: 42,609.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,527.30 : 105,789.82 = 28,406.38 : x
  2. Step 2: Convert to fraction form
    70,527.30/105,789.82 = 28,406.38/x
  3. Step 3: Cross multiply
    70,527.30x = 105,789.82 × 28,406.38
  4. Step 4: Simplify right side
    70,527.30x = 3,005,105,827.05
  5. Step 5: Solve for x
    x = 3,005,105,827.05/70,527.30
  6. Step 6: Final answer
    x = 42,609.11

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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.