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Finding the Fourth Proportional to 251,511.94, 347,079.54 and 138,334.78

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Solution

The fourth proportional to 251,511.94, 347,079.54 and 138,334.78 is: 190,898.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,511.94 : 347,079.54 = 138,334.78 : x
  2. Step 2: Convert to fraction form
    251,511.94/347,079.54 = 138,334.78/x
  3. Step 3: Cross multiply
    251,511.94x = 347,079.54 × 138,334.78
  4. Step 4: Simplify right side
    251,511.94x = 48,013,171,808.40
  5. Step 5: Solve for x
    x = 48,013,171,808.40/251,511.94
  6. Step 6: Final answer
    x = 190,898.18

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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.