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Finding the Fourth Proportional to 71,161.70, 106,742.55 and 51,478.70

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Solution

The fourth proportional to 71,161.70, 106,742.55 and 51,478.70 is: 77,218.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,161.70 : 106,742.55 = 51,478.70 : x
  2. Step 2: Convert to fraction form
    71,161.70/106,742.55 = 51,478.70/x
  3. Step 3: Cross multiply
    71,161.70x = 106,742.55 × 51,478.70
  4. Step 4: Simplify right side
    71,161.70x = 5,494,967,708.69
  5. Step 5: Solve for x
    x = 5,494,967,708.69/71,161.70
  6. Step 6: Final answer
    x = 77,218.05

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1.5x scale

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.