Home / 138,116.97-190,603.38-81,528.34

Finding the Fourth Proportional to 138,116.97, 190,603.38 and 81,528.34

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Solution

The fourth proportional to 138,116.97, 190,603.38 and 81,528.34 is: 112,510.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,116.97 : 190,603.38 = 81,528.34 : x
  2. Step 2: Convert to fraction form
    138,116.97/190,603.38 = 81,528.34/x
  3. Step 3: Cross multiply
    138,116.97x = 190,603.38 × 81,528.34
  4. Step 4: Simplify right side
    138,116.97x = 15,539,577,169.79
  5. Step 5: Solve for x
    x = 15,539,577,169.79/138,116.97
  6. Step 6: Final answer
    x = 112,510.27

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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.