Home / 138,862.43-191,628.59-81,491.49

Finding the Fourth Proportional to 138,862.43, 191,628.59 and 81,491.49

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Solution

The fourth proportional to 138,862.43, 191,628.59 and 81,491.49 is: 112,457.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,862.43 : 191,628.59 = 81,491.49 : x
  2. Step 2: Convert to fraction form
    138,862.43/191,628.59 = 81,491.49/x
  3. Step 3: Cross multiply
    138,862.43x = 191,628.59 × 81,491.49
  4. Step 4: Simplify right side
    138,862.43x = 15,616,099,457.20
  5. Step 5: Solve for x
    x = 15,616,099,457.20/138,862.43
  6. Step 6: Final answer
    x = 112,457.34

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1.5x scale

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.