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Finding the Fourth Proportional to 79,140.65, 109,213.72 and 43,330.34

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Solution

The fourth proportional to 79,140.65, 109,213.72 and 43,330.34 is: 59,795.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,140.65 : 109,213.72 = 43,330.34 : x
  2. Step 2: Convert to fraction form
    79,140.65/109,213.72 = 43,330.34/x
  3. Step 3: Cross multiply
    79,140.65x = 109,213.72 × 43,330.34
  4. Step 4: Simplify right side
    79,140.65x = 4,732,267,784.97
  5. Step 5: Solve for x
    x = 4,732,267,784.97/79,140.65
  6. Step 6: Final answer
    x = 59,795.67

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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.