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Finding the Fourth Proportional to 425,341.34, 638,105.45 and 125,798.57

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Solution

The fourth proportional to 425,341.34, 638,105.45 and 125,798.57 is: 188,725.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,341.34 : 638,105.45 = 125,798.57 : x
  2. Step 2: Convert to fraction form
    425,341.34/638,105.45 = 125,798.57/x
  3. Step 3: Cross multiply
    425,341.34x = 638,105.45 × 125,798.57
  4. Step 4: Simplify right side
    425,341.34x = 80,272,753,119.21
  5. Step 5: Solve for x
    x = 80,272,753,119.21/425,341.34
  6. Step 6: Final answer
    x = 188,725.49

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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.