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Finding the Fourth Proportional to 158,659.65, 218,964.15 and 87,053.67

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Solution

The fourth proportional to 158,659.65, 218,964.15 and 87,053.67 is: 120,141.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,659.65 : 218,964.15 = 87,053.67 : x
  2. Step 2: Convert to fraction form
    158,659.65/218,964.15 = 87,053.67/x
  3. Step 3: Cross multiply
    158,659.65x = 218,964.15 × 87,053.67
  4. Step 4: Simplify right side
    158,659.65x = 19,061,632,855.93
  5. Step 5: Solve for x
    x = 19,061,632,855.93/158,659.65
  6. Step 6: Final answer
    x = 120,141.65

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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.