Home / 422,720.51-634,158.50-138,426.89

Finding the Fourth Proportional to 422,720.51, 634,158.50 and 138,426.89

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Solution

The fourth proportional to 422,720.51, 634,158.50 and 138,426.89 is: 207,665.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,720.51 : 634,158.50 = 138,426.89 : x
  2. Step 2: Convert to fraction form
    422,720.51/634,158.50 = 138,426.89/x
  3. Step 3: Cross multiply
    422,720.51x = 634,158.50 × 138,426.89
  4. Step 4: Simplify right side
    422,720.51x = 87,784,585,059.14
  5. Step 5: Solve for x
    x = 87,784,585,059.14/422,720.51
  6. Step 6: Final answer
    x = 207,665.78

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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.