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Finding the Fourth Proportional to 123,989.46, 171,101.88 and 70,279.44

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Solution

The fourth proportional to 123,989.46, 171,101.88 and 70,279.44 is: 96,983.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,989.46 : 171,101.88 = 70,279.44 : x
  2. Step 2: Convert to fraction form
    123,989.46/171,101.88 = 70,279.44/x
  3. Step 3: Cross multiply
    123,989.46x = 171,101.88 × 70,279.44
  4. Step 4: Simplify right side
    123,989.46x = 12,024,944,309.35
  5. Step 5: Solve for x
    x = 12,024,944,309.35/123,989.46
  6. Step 6: Final answer
    x = 96,983.60

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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.