Home / 78,709.10-108,532.80-53,171.15

Finding the Fourth Proportional to 78,709.10, 108,532.80 and 53,171.15

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Solution

The fourth proportional to 78,709.10, 108,532.80 and 53,171.15 is: 73,318.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,709.10 : 108,532.80 = 53,171.15 : x
  2. Step 2: Convert to fraction form
    78,709.10/108,532.80 = 53,171.15/x
  3. Step 3: Cross multiply
    78,709.10x = 108,532.80 × 53,171.15
  4. Step 4: Simplify right side
    78,709.10x = 5,770,813,852.45
  5. Step 5: Solve for x
    x = 5,770,813,852.45/78,709.10
  6. Step 6: Final answer
    x = 73,318.25

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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.