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Finding the Fourth Proportional to 84,460.79, 126,438.78 and 51,079.88

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Solution

The fourth proportional to 84,460.79, 126,438.78 and 51,079.88 is: 76,467.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,460.79 : 126,438.78 = 51,079.88 : x
  2. Step 2: Convert to fraction form
    84,460.79/126,438.78 = 51,079.88/x
  3. Step 3: Cross multiply
    84,460.79x = 126,438.78 × 51,079.88
  4. Step 4: Simplify right side
    84,460.79x = 6,458,477,709.75
  5. Step 5: Solve for x
    x = 6,458,477,709.75/84,460.79
  6. Step 6: Final answer
    x = 76,467.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.