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Finding the Fourth Proportional to 158,334.03, 218,499.21 and 86,709.78

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Solution

The fourth proportional to 158,334.03, 218,499.21 and 86,709.78 is: 119,658.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,334.03 : 218,499.21 = 86,709.78 : x
  2. Step 2: Convert to fraction form
    158,334.03/218,499.21 = 86,709.78/x
  3. Step 3: Cross multiply
    158,334.03x = 218,499.21 × 86,709.78
  4. Step 4: Simplify right side
    158,334.03x = 18,946,018,429.27
  5. Step 5: Solve for x
    x = 18,946,018,429.27/158,334.03
  6. Step 6: Final answer
    x = 119,658.54

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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.