Home / 81,720.28-112,812.60-54,541.36

Finding the Fourth Proportional to 81,720.28, 112,812.60 and 54,541.36

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Solution

The fourth proportional to 81,720.28, 112,812.60 and 54,541.36 is: 75,292.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.28 : 112,812.60 = 54,541.36 : x
  2. Step 2: Convert to fraction form
    81,720.28/112,812.60 = 54,541.36/x
  3. Step 3: Cross multiply
    81,720.28x = 112,812.60 × 54,541.36
  4. Step 4: Simplify right side
    81,720.28x = 6,152,952,629.14
  5. Step 5: Solve for x
    x = 6,152,952,629.14/81,720.28
  6. Step 6: Final answer
    x = 75,292.85

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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.