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Finding the Fourth Proportional to 123,954.98, 171,043.16 and 72,956.43

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Solution

The fourth proportional to 123,954.98, 171,043.16 and 72,956.43 is: 100,671.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,954.98 : 171,043.16 = 72,956.43 : x
  2. Step 2: Convert to fraction form
    123,954.98/171,043.16 = 72,956.43/x
  3. Step 3: Cross multiply
    123,954.98x = 171,043.16 × 72,956.43
  4. Step 4: Simplify right side
    123,954.98x = 12,478,697,964.74
  5. Step 5: Solve for x
    x = 12,478,697,964.74/123,954.98
  6. Step 6: Final answer
    x = 100,671.22

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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.