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Finding the Fourth Proportional to 79,439.19, 109,635.81 and 45,905.19

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Solution

The fourth proportional to 79,439.19, 109,635.81 and 45,905.19 is: 63,354.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,439.19 : 109,635.81 = 45,905.19 : x
  2. Step 2: Convert to fraction form
    79,439.19/109,635.81 = 45,905.19/x
  3. Step 3: Cross multiply
    79,439.19x = 109,635.81 × 45,905.19
  4. Step 4: Simplify right side
    79,439.19x = 5,032,852,688.85
  5. Step 5: Solve for x
    x = 5,032,852,688.85/79,439.19
  6. Step 6: Final answer
    x = 63,354.78

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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.