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Finding the Fourth Proportional to 158,234.99, 218,366.69 and 86,621.67

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Solution

The fourth proportional to 158,234.99, 218,366.69 and 86,621.67 is: 119,539.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,234.99 : 218,366.69 = 86,621.67 : x
  2. Step 2: Convert to fraction form
    158,234.99/218,366.69 = 86,621.67/x
  3. Step 3: Cross multiply
    158,234.99x = 218,366.69 × 86,621.67
  4. Step 4: Simplify right side
    158,234.99x = 18,915,286,927.06
  5. Step 5: Solve for x
    x = 18,915,286,927.06/158,234.99
  6. Step 6: Final answer
    x = 119,539.22

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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.