Home / 138,162,806.43-190,642,167.50-81,639,687.10

Finding the Fourth Proportional to 138,162,806.43, 190,642,167.50 and 81,639,687.10

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Solution

The fourth proportional to 138,162,806.43, 190,642,167.50 and 81,639,687.10 is: 112,649,469.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,162,806.43 : 190,642,167.50 = 81,639,687.10 : x
  2. Step 2: Convert to fraction form
    138,162,806.43/190,642,167.50 = 81,639,687.10/x
  3. Step 3: Cross multiply
    138,162,806.43x = 190,642,167.50 × 81,639,687.10
  4. Step 4: Simplify right side
    138,162,806.43x = 15,563,966,901,880,986
  5. Step 5: Solve for x
    x = 15,563,966,901,880,986/138,162,806.43
  6. Step 6: Final answer
    x = 112,649,469.88

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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.