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Finding the Fourth Proportional to 70,506.82, 105,757.80 and 28,373.86

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Solution

The fourth proportional to 70,506.82, 105,757.80 and 28,373.86 is: 42,559.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,506.82 : 105,757.80 = 28,373.86 : x
  2. Step 2: Convert to fraction form
    70,506.82/105,757.80 = 28,373.86/x
  3. Step 3: Cross multiply
    70,506.82x = 105,757.80 × 28,373.86
  4. Step 4: Simplify right side
    70,506.82x = 3,000,757,011.11
  5. Step 5: Solve for x
    x = 3,000,757,011.11/70,506.82
  6. Step 6: Final answer
    x = 42,559.81

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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.