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Finding the Fourth Proportional to 271,796.64, 407,508.93 and 138,418.80

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Solution

The fourth proportional to 271,796.64, 407,508.93 and 138,418.80 is: 207,533.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,796.64 : 407,508.93 = 138,418.80 : x
  2. Step 2: Convert to fraction form
    271,796.64/407,508.93 = 138,418.80/x
  3. Step 3: Cross multiply
    271,796.64x = 407,508.93 × 138,418.80
  4. Step 4: Simplify right side
    271,796.64x = 56,406,897,079.88
  5. Step 5: Solve for x
    x = 56,406,897,079.88/271,796.64
  6. Step 6: Final answer
    x = 207,533.46

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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.