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Finding the Fourth Proportional to 158,529.70, 218,768.47 and 86,910.21

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Solution

The fourth proportional to 158,529.70, 218,768.47 and 86,910.21 is: 119,934.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,529.70 : 218,768.47 = 86,910.21 : x
  2. Step 2: Convert to fraction form
    158,529.70/218,768.47 = 86,910.21/x
  3. Step 3: Cross multiply
    158,529.70x = 218,768.47 × 86,910.21
  4. Step 4: Simplify right side
    158,529.70x = 19,013,213,451.80
  5. Step 5: Solve for x
    x = 19,013,213,451.80/158,529.70
  6. Step 6: Final answer
    x = 119,934.71

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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.