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Finding the Fourth Proportional to 79,642.10, 109,893.51 and 45,644.04

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Solution

The fourth proportional to 79,642.10, 109,893.51 and 45,644.04 is: 62,981.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,642.10 : 109,893.51 = 45,644.04 : x
  2. Step 2: Convert to fraction form
    79,642.10/109,893.51 = 45,644.04/x
  3. Step 3: Cross multiply
    79,642.10x = 109,893.51 × 45,644.04
  4. Step 4: Simplify right side
    79,642.10x = 5,015,983,766.18
  5. Step 5: Solve for x
    x = 5,015,983,766.18/79,642.10
  6. Step 6: Final answer
    x = 62,981.56

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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.