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Finding the Fourth Proportional to 425,318.06, 638,101.64 and 125,806.61

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Solution

The fourth proportional to 425,318.06, 638,101.64 and 125,806.61 is: 188,746.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,318.06 : 638,101.64 = 125,806.61 : x
  2. Step 2: Convert to fraction form
    425,318.06/638,101.64 = 125,806.61/x
  3. Step 3: Cross multiply
    425,318.06x = 638,101.64 × 125,806.61
  4. Step 4: Simplify right side
    425,318.06x = 80,277,404,405.40
  5. Step 5: Solve for x
    x = 80,277,404,405.40/425,318.06
  6. Step 6: Final answer
    x = 188,746.76

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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.