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Finding the Fourth Proportional to 79,454.40, 109,644.13 and 43,642.28

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Solution

The fourth proportional to 79,454.40, 109,644.13 and 43,642.28 is: 60,224.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,454.40 : 109,644.13 = 43,642.28 : x
  2. Step 2: Convert to fraction form
    79,454.40/109,644.13 = 43,642.28/x
  3. Step 3: Cross multiply
    79,454.40x = 109,644.13 × 43,642.28
  4. Step 4: Simplify right side
    79,454.40x = 4,785,119,821.82
  5. Step 5: Solve for x
    x = 4,785,119,821.82/79,454.40
  6. Step 6: Final answer
    x = 60,224.73

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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.