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Finding the Fourth Proportional to 79,468.64, 109,661.44 and 45,472.96

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Solution

The fourth proportional to 79,468.64, 109,661.44 and 45,472.96 is: 62,749.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,468.64 : 109,661.44 = 45,472.96 : x
  2. Step 2: Convert to fraction form
    79,468.64/109,661.44 = 45,472.96/x
  3. Step 3: Cross multiply
    79,468.64x = 109,661.44 × 45,472.96
  4. Step 4: Simplify right side
    79,468.64x = 4,986,630,274.66
  5. Step 5: Solve for x
    x = 4,986,630,274.66/79,468.64
  6. Step 6: Final answer
    x = 62,749.66

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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.