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Finding the Fourth Proportional to 70,563.50, 105,818.54 and 28,429.28

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Solution

The fourth proportional to 70,563.50, 105,818.54 and 28,429.28 is: 42,633.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,563.50 : 105,818.54 = 28,429.28 : x
  2. Step 2: Convert to fraction form
    70,563.50/105,818.54 = 28,429.28/x
  3. Step 3: Cross multiply
    70,563.50x = 105,818.54 × 28,429.28
  4. Step 4: Simplify right side
    70,563.50x = 3,008,344,902.85
  5. Step 5: Solve for x
    x = 3,008,344,902.85/70,563.50
  6. Step 6: Final answer
    x = 42,633.16

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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.