Home / 77,129.97-106,439.06-43,138.32

Finding the Fourth Proportional to 77,129.97, 106,439.06 and 43,138.32

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Solution

The fourth proportional to 77,129.97, 106,439.06 and 43,138.32 is: 59,530.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,129.97 : 106,439.06 = 43,138.32 : x
  2. Step 2: Convert to fraction form
    77,129.97/106,439.06 = 43,138.32/x
  3. Step 3: Cross multiply
    77,129.97x = 106,439.06 × 43,138.32
  4. Step 4: Simplify right side
    77,129.97x = 4,591,602,015.09
  5. Step 5: Solve for x
    x = 4,591,602,015.09/77,129.97
  6. Step 6: Final answer
    x = 59,530.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.