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Finding the Fourth Proportional to 79,410.64, 118,860 and 43,816

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Solution

The fourth proportional to 79,410.64, 118,860 and 43,816 is: 65,582.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,410.64 : 118,860 = 43,816 : x
  2. Step 2: Convert to fraction form
    79,410.64/118,860 = 43,816/x
  3. Step 3: Cross multiply
    79,410.64x = 118,860 × 43,816
  4. Step 4: Simplify right side
    79,410.64x = 5,207,969,760
  5. Step 5: Solve for x
    x = 5,207,969,760/79,410.64
  6. Step 6: Final answer
    x = 65,582.77

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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.