Home / 100,429.44-138,594.24-57,991.68

Finding the Fourth Proportional to 100,429.44, 138,594.24 and 57,991.68

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Solution

The fourth proportional to 100,429.44, 138,594.24 and 57,991.68 is: 80,029.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,429.44 : 138,594.24 = 57,991.68 : x
  2. Step 2: Convert to fraction form
    100,429.44/138,594.24 = 57,991.68/x
  3. Step 3: Cross multiply
    100,429.44x = 138,594.24 × 57,991.68
  4. Step 4: Simplify right side
    100,429.44x = 8,037,312,815.92
  5. Step 5: Solve for x
    x = 8,037,312,815.92/100,429.44
  6. Step 6: Final answer
    x = 80,029.45

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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.