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Finding the Fourth Proportional to 79,661.21, 109,935.60 and 43,854.55

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Solution

The fourth proportional to 79,661.21, 109,935.60 and 43,854.55 is: 60,521.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,661.21 : 109,935.60 = 43,854.55 : x
  2. Step 2: Convert to fraction form
    79,661.21/109,935.60 = 43,854.55/x
  3. Step 3: Cross multiply
    79,661.21x = 109,935.60 × 43,854.55
  4. Step 4: Simplify right side
    79,661.21x = 4,821,176,266.98
  5. Step 5: Solve for x
    x = 4,821,176,266.98/79,661.21
  6. Step 6: Final answer
    x = 60,521.00

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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.