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Finding the Fourth Proportional to 70,207.20, 105,310.80 and 40,682.70

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Solution

The fourth proportional to 70,207.20, 105,310.80 and 40,682.70 is: 61,024.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,207.20 : 105,310.80 = 40,682.70 : x
  2. Step 2: Convert to fraction form
    70,207.20/105,310.80 = 40,682.70/x
  3. Step 3: Cross multiply
    70,207.20x = 105,310.80 × 40,682.70
  4. Step 4: Simplify right side
    70,207.20x = 4,284,327,683.16
  5. Step 5: Solve for x
    x = 4,284,327,683.16/70,207.20
  6. Step 6: Final answer
    x = 61,024.05

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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.