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Finding the Fourth Proportional to 79,113.48, 109,186.68 and 51,912.48

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Solution

The fourth proportional to 79,113.48, 109,186.68 and 51,912.48 is: 71,645.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,113.48 : 109,186.68 = 51,912.48 : x
  2. Step 2: Convert to fraction form
    79,113.48/109,186.68 = 51,912.48/x
  3. Step 3: Cross multiply
    79,113.48x = 109,186.68 × 51,912.48
  4. Step 4: Simplify right side
    79,113.48x = 5,668,151,341.77
  5. Step 5: Solve for x
    x = 5,668,151,341.77/79,113.48
  6. Step 6: Final answer
    x = 71,645.84

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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.