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Finding the Fourth Proportional to 251,508.48, 347,076 and 138,328.80

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Solution

The fourth proportional to 251,508.48, 347,076 and 138,328.80 is: 190,890.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,508.48 : 347,076 = 138,328.80 : x
  2. Step 2: Convert to fraction form
    251,508.48/347,076 = 138,328.80/x
  3. Step 3: Cross multiply
    251,508.48x = 347,076 × 138,328.80
  4. Step 4: Simplify right side
    251,508.48x = 48,010,606,588.80
  5. Step 5: Solve for x
    x = 48,010,606,588.80/251,508.48
  6. Step 6: Final answer
    x = 190,890.61

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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.