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Finding the Fourth Proportional to 154,712.63, 213,503.43 and 87,644.63

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Solution

The fourth proportional to 154,712.63, 213,503.43 and 87,644.63 is: 120,949.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,712.63 : 213,503.43 = 87,644.63 : x
  2. Step 2: Convert to fraction form
    154,712.63/213,503.43 = 87,644.63/x
  3. Step 3: Cross multiply
    154,712.63x = 213,503.43 × 87,644.63
  4. Step 4: Simplify right side
    154,712.63x = 18,712,428,058.56
  5. Step 5: Solve for x
    x = 18,712,428,058.56/154,712.63
  6. Step 6: Final answer
    x = 120,949.59

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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.