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Finding the Fourth Proportional to 79,681.20, 109,961.46 and 45,689.64

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Solution

The fourth proportional to 79,681.20, 109,961.46 and 45,689.64 is: 63,052.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,681.20 : 109,961.46 = 45,689.64 : x
  2. Step 2: Convert to fraction form
    79,681.20/109,961.46 = 45,689.64/x
  3. Step 3: Cross multiply
    79,681.20x = 109,961.46 × 45,689.64
  4. Step 4: Simplify right side
    79,681.20x = 5,024,099,521.27
  5. Step 5: Solve for x
    x = 5,024,099,521.27/79,681.20
  6. Step 6: Final answer
    x = 63,052.51

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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.