Home / 78,431.03-108,234.74-42,620.97

Finding the Fourth Proportional to 78,431.03, 108,234.74 and 42,620.97

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Solution

The fourth proportional to 78,431.03, 108,234.74 and 42,620.97 is: 58,816.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,431.03 : 108,234.74 = 42,620.97 : x
  2. Step 2: Convert to fraction form
    78,431.03/108,234.74 = 42,620.97/x
  3. Step 3: Cross multiply
    78,431.03x = 108,234.74 × 42,620.97
  4. Step 4: Simplify right side
    78,431.03x = 4,613,069,713.05
  5. Step 5: Solve for x
    x = 4,613,069,713.05/78,431.03
  6. Step 6: Final answer
    x = 58,816.89

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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.