Home / 137,029.32-189,021.60-80,429.76

Finding the Fourth Proportional to 137,029.32, 189,021.60 and 80,429.76

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Solution

The fourth proportional to 137,029.32, 189,021.60 and 80,429.76 is: 110,946.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,029.32 : 189,021.60 = 80,429.76 : x
  2. Step 2: Convert to fraction form
    137,029.32/189,021.60 = 80,429.76/x
  3. Step 3: Cross multiply
    137,029.32x = 189,021.60 × 80,429.76
  4. Step 4: Simplify right side
    137,029.32x = 15,202,961,922.82
  5. Step 5: Solve for x
    x = 15,202,961,922.82/137,029.32
  6. Step 6: Final answer
    x = 110,946.78

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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.