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Finding the Fourth Proportional to 123,859.84, 171,262.08 and 121,858.56

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Solution

The fourth proportional to 123,859.84, 171,262.08 and 121,858.56 is: 168,494.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,859.84 : 171,262.08 = 121,858.56 : x
  2. Step 2: Convert to fraction form
    123,859.84/171,262.08 = 121,858.56/x
  3. Step 3: Cross multiply
    123,859.84x = 171,262.08 × 121,858.56
  4. Step 4: Simplify right side
    123,859.84x = 20,869,750,451.40
  5. Step 5: Solve for x
    x = 20,869,750,451.40/123,859.84
  6. Step 6: Final answer
    x = 168,494.89

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1.5x scale

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.