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Finding the Fourth Proportional to 251,616, 347,235.48 and 138,438.96

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Solution

The fourth proportional to 251,616, 347,235.48 and 138,438.96 is: 191,048.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,616 : 347,235.48 = 138,438.96 : x
  2. Step 2: Convert to fraction form
    251,616/347,235.48 = 138,438.96/x
  3. Step 3: Cross multiply
    251,616x = 347,235.48 × 138,438.96
  4. Step 4: Simplify right side
    251,616x = 48,070,918,726.30
  5. Step 5: Solve for x
    x = 48,070,918,726.30/251,616
  6. Step 6: Final answer
    x = 191,048.74

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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.