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Finding the Fourth Proportional to 158,369.54, 218,542.20 and 86,749.88

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Solution

The fourth proportional to 158,369.54, 218,542.20 and 86,749.88 is: 119,710.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,369.54 : 218,542.20 = 86,749.88 : x
  2. Step 2: Convert to fraction form
    158,369.54/218,542.20 = 86,749.88/x
  3. Step 3: Cross multiply
    158,369.54x = 218,542.20 × 86,749.88
  4. Step 4: Simplify right side
    158,369.54x = 18,958,509,624.94
  5. Step 5: Solve for x
    x = 18,958,509,624.94/158,369.54
  6. Step 6: Final answer
    x = 119,710.58

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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.