Home / 113,513.40-155,514.14-109,256.96

Finding the Fourth Proportional to 113,513.40, 155,514.14 and 109,256.96

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Solution

The fourth proportional to 113,513.40, 155,514.14 and 109,256.96 is: 149,682.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,513.40 : 155,514.14 = 109,256.96 : x
  2. Step 2: Convert to fraction form
    113,513.40/155,514.14 = 109,256.96/x
  3. Step 3: Cross multiply
    113,513.40x = 155,514.14 × 109,256.96
  4. Step 4: Simplify right side
    113,513.40x = 16,991,000,849.56
  5. Step 5: Solve for x
    x = 16,991,000,849.56/113,513.40
  6. Step 6: Final answer
    x = 149,682.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.