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Finding the Fourth Proportional to 425,955.92, 639,066.84 and 126,437.84

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Solution

The fourth proportional to 425,955.92, 639,066.84 and 126,437.84 is: 189,696.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,955.92 : 639,066.84 = 126,437.84 : x
  2. Step 2: Convert to fraction form
    425,955.92/639,066.84 = 126,437.84/x
  3. Step 3: Cross multiply
    425,955.92x = 639,066.84 × 126,437.84
  4. Step 4: Simplify right side
    425,955.92x = 80,802,230,865.23
  5. Step 5: Solve for x
    x = 80,802,230,865.23/425,955.92
  6. Step 6: Final answer
    x = 189,696.23

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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.