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Finding the Fourth Proportional to 79,439.57, 109,636.33 and 45,905.57

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Solution

The fourth proportional to 79,439.57, 109,636.33 and 45,905.57 is: 63,355.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,439.57 : 109,636.33 = 45,905.57 : x
  2. Step 2: Convert to fraction form
    79,439.57/109,636.33 = 45,905.57/x
  3. Step 3: Cross multiply
    79,439.57x = 109,636.33 × 45,905.57
  4. Step 4: Simplify right side
    79,439.57x = 5,032,917,673.18
  5. Step 5: Solve for x
    x = 5,032,917,673.18/79,439.57
  6. Step 6: Final answer
    x = 63,355.30

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1.5x scale

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.