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Finding the Fourth Proportional to 251,879.34, 347,502.20 and 142,920.58

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Solution

The fourth proportional to 251,879.34, 347,502.20 and 142,920.58 is: 197,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,879.34 : 347,502.20 = 142,920.58 : x
  2. Step 2: Convert to fraction form
    251,879.34/347,502.20 = 142,920.58/x
  3. Step 3: Cross multiply
    251,879.34x = 347,502.20 × 142,920.58
  4. Step 4: Simplify right side
    251,879.34x = 49,665,214,391.92
  5. Step 5: Solve for x
    x = 49,665,214,391.92/251,879.34
  6. Step 6: Final answer
    x = 197,178.60

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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.