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Finding the Fourth Proportional to 70,712.20, 106,138.01 and 51,939.54

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Solution

The fourth proportional to 70,712.20, 106,138.01 and 51,939.54 is: 77,960.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,712.20 : 106,138.01 = 51,939.54 : x
  2. Step 2: Convert to fraction form
    70,712.20/106,138.01 = 51,939.54/x
  3. Step 3: Cross multiply
    70,712.20x = 106,138.01 × 51,939.54
  4. Step 4: Simplify right side
    70,712.20x = 5,512,759,804.58
  5. Step 5: Solve for x
    x = 5,512,759,804.58/70,712.20
  6. Step 6: Final answer
    x = 77,960.52

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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.