Home / 76,680.28-105,816.19-43,139.80

Finding the Fourth Proportional to 76,680.28, 105,816.19 and 43,139.80

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Solution

The fourth proportional to 76,680.28, 105,816.19 and 43,139.80 is: 59,531.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,680.28 : 105,816.19 = 43,139.80 : x
  2. Step 2: Convert to fraction form
    76,680.28/105,816.19 = 43,139.80/x
  3. Step 3: Cross multiply
    76,680.28x = 105,816.19 × 43,139.80
  4. Step 4: Simplify right side
    76,680.28x = 4,564,889,273.36
  5. Step 5: Solve for x
    x = 4,564,889,273.36/76,680.28
  6. Step 6: Final answer
    x = 59,531.46

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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.