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Finding the Fourth Proportional to 79,640.25, 109,906.14 and 45,655.19

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Solution

The fourth proportional to 79,640.25, 109,906.14 and 45,655.19 is: 63,005.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,640.25 : 109,906.14 = 45,655.19 : x
  2. Step 2: Convert to fraction form
    79,640.25/109,906.14 = 45,655.19/x
  3. Step 3: Cross multiply
    79,640.25x = 109,906.14 × 45,655.19
  4. Step 4: Simplify right side
    79,640.25x = 5,017,785,154.34
  5. Step 5: Solve for x
    x = 5,017,785,154.34/79,640.25
  6. Step 6: Final answer
    x = 63,005.64

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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.