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Finding the Fourth Proportional to 70,548.27, 105,825.89 and 28,422.70

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Solution

The fourth proportional to 70,548.27, 105,825.89 and 28,422.70 is: 42,635.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,548.27 : 105,825.89 = 28,422.70 : x
  2. Step 2: Convert to fraction form
    70,548.27/105,825.89 = 28,422.70/x
  3. Step 3: Cross multiply
    70,548.27x = 105,825.89 × 28,422.70
  4. Step 4: Simplify right side
    70,548.27x = 3,007,857,330.20
  5. Step 5: Solve for x
    x = 3,007,857,330.20/70,548.27
  6. Step 6: Final answer
    x = 42,635.45

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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.