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Finding the Fourth Proportional to 154,503.48, 213,241.50 and 87,435.48

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Solution

The fourth proportional to 154,503.48, 213,241.50 and 87,435.48 is: 120,676.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,503.48 : 213,241.50 = 87,435.48 : x
  2. Step 2: Convert to fraction form
    154,503.48/213,241.50 = 87,435.48/x
  3. Step 3: Cross multiply
    154,503.48x = 213,241.50 × 87,435.48
  4. Step 4: Simplify right side
    154,503.48x = 18,644,872,908.42
  5. Step 5: Solve for x
    x = 18,644,872,908.42/154,503.48
  6. Step 6: Final answer
    x = 120,676.07

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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.