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Finding the Fourth Proportional to 79,469.98, 109,578.81 and 57,921.64

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Solution

The fourth proportional to 79,469.98, 109,578.81 and 57,921.64 is: 79,866.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,469.98 : 109,578.81 = 57,921.64 : x
  2. Step 2: Convert to fraction form
    79,469.98/109,578.81 = 57,921.64/x
  3. Step 3: Cross multiply
    79,469.98x = 109,578.81 × 57,921.64
  4. Step 4: Simplify right side
    79,469.98x = 6,346,984,384.45
  5. Step 5: Solve for x
    x = 6,346,984,384.45/79,469.98
  6. Step 6: Final answer
    x = 79,866.44

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1.5x scale

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.