Home / 138,104.12-190,609.83-86,445.17

Finding the Fourth Proportional to 138,104.12, 190,609.83 and 86,445.17

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Solution

The fourth proportional to 138,104.12, 190,609.83 and 86,445.17 is: 119,310.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,104.12 : 190,609.83 = 86,445.17 : x
  2. Step 2: Convert to fraction form
    138,104.12/190,609.83 = 86,445.17/x
  3. Step 3: Cross multiply
    138,104.12x = 190,609.83 × 86,445.17
  4. Step 4: Simplify right side
    138,104.12x = 16,477,298,204.97
  5. Step 5: Solve for x
    x = 16,477,298,204.97/138,104.12
  6. Step 6: Final answer
    x = 119,310.70

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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.