Home / 138,153.18-190,651.68-81,568.20

Finding the Fourth Proportional to 138,153.18, 190,651.68 and 81,568.20

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Solution

The fourth proportional to 138,153.18, 190,651.68 and 81,568.20 is: 112,564.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,153.18 : 190,651.68 = 81,568.20 : x
  2. Step 2: Convert to fraction form
    138,153.18/190,651.68 = 81,568.20/x
  3. Step 3: Cross multiply
    138,153.18x = 190,651.68 × 81,568.20
  4. Step 4: Simplify right side
    138,153.18x = 15,551,114,364.58
  5. Step 5: Solve for x
    x = 15,551,114,364.58/138,153.18
  6. Step 6: Final answer
    x = 112,564.29

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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.