Home / 100,426.87-138,594.09-57,408.58

Finding the Fourth Proportional to 100,426.87, 138,594.09 and 57,408.58

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Solution

The fourth proportional to 100,426.87, 138,594.09 and 57,408.58 is: 79,226.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,426.87 : 138,594.09 = 57,408.58 : x
  2. Step 2: Convert to fraction form
    100,426.87/138,594.09 = 57,408.58/x
  3. Step 3: Cross multiply
    100,426.87x = 138,594.09 × 57,408.58
  4. Step 4: Simplify right side
    100,426.87x = 7,956,489,903.29
  5. Step 5: Solve for x
    x = 7,956,489,903.29/100,426.87
  6. Step 6: Final answer
    x = 79,226.70

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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.