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Finding the Fourth Proportional to 79,287.60, 109,416.60 and 43,476.70

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Solution

The fourth proportional to 79,287.60, 109,416.60 and 43,476.70 is: 59,997.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,287.60 : 109,416.60 = 43,476.70 : x
  2. Step 2: Convert to fraction form
    79,287.60/109,416.60 = 43,476.70/x
  3. Step 3: Cross multiply
    79,287.60x = 109,416.60 × 43,476.70
  4. Step 4: Simplify right side
    79,287.60x = 4,757,072,693.22
  5. Step 5: Solve for x
    x = 4,757,072,693.22/79,287.60
  6. Step 6: Final answer
    x = 59,997.69

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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.