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Finding the Fourth Proportional to 79,412.64, 118,863 and 43,818

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Solution

The fourth proportional to 79,412.64, 118,863 and 43,818 is: 65,585.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,412.64 : 118,863 = 43,818 : x
  2. Step 2: Convert to fraction form
    79,412.64/118,863 = 43,818/x
  3. Step 3: Cross multiply
    79,412.64x = 118,863 × 43,818
  4. Step 4: Simplify right side
    79,412.64x = 5,208,338,934
  5. Step 5: Solve for x
    x = 5,208,338,934/79,412.64
  6. Step 6: Final answer
    x = 65,585.77

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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.