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Finding the Fourth Proportional to 84,368.64, 126,489.96 and 51,080.72

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Solution

The fourth proportional to 84,368.64, 126,489.96 and 51,080.72 is: 76,582.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,368.64 : 126,489.96 = 51,080.72 : x
  2. Step 2: Convert to fraction form
    84,368.64/126,489.96 = 51,080.72/x
  3. Step 3: Cross multiply
    84,368.64x = 126,489.96 × 51,080.72
  4. Step 4: Simplify right side
    84,368.64x = 6,461,198,229.57
  5. Step 5: Solve for x
    x = 6,461,198,229.57/84,368.64
  6. Step 6: Final answer
    x = 76,582.94

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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.