Home / 78,821.28-108,817.56-54,657.36

Finding the Fourth Proportional to 78,821.28, 108,817.56 and 54,657.36

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Solution

The fourth proportional to 78,821.28, 108,817.56 and 54,657.36 is: 75,457.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,821.28 : 108,817.56 = 54,657.36 : x
  2. Step 2: Convert to fraction form
    78,821.28/108,817.56 = 54,657.36/x
  3. Step 3: Cross multiply
    78,821.28x = 108,817.56 × 54,657.36
  4. Step 4: Simplify right side
    78,821.28x = 5,947,680,551.24
  5. Step 5: Solve for x
    x = 5,947,680,551.24/78,821.28
  6. Step 6: Final answer
    x = 75,457.80

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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.