Home / 425,628.09-638,536.10-126,132.57

Finding the Fourth Proportional to 425,628.09, 638,536.10 and 126,132.57

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Solution

The fourth proportional to 425,628.09, 638,536.10 and 126,132.57 is: 189,226.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,628.09 : 638,536.10 = 126,132.57 : x
  2. Step 2: Convert to fraction form
    425,628.09/638,536.10 = 126,132.57/x
  3. Step 3: Cross multiply
    425,628.09x = 638,536.10 × 126,132.57
  4. Step 4: Simplify right side
    425,628.09x = 80,540,198,700.11
  5. Step 5: Solve for x
    x = 80,540,198,700.11/425,628.09
  6. Step 6: Final answer
    x = 189,226.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.