Home / 135,399.40-186,792.35-81,654.55

Finding the Fourth Proportional to 135,399.40, 186,792.35 and 81,654.55

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Solution

The fourth proportional to 135,399.40, 186,792.35 and 81,654.55 is: 112,647.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,399.40 : 186,792.35 = 81,654.55 : x
  2. Step 2: Convert to fraction form
    135,399.40/186,792.35 = 81,654.55/x
  3. Step 3: Cross multiply
    135,399.40x = 186,792.35 × 81,654.55
  4. Step 4: Simplify right side
    135,399.40x = 15,252,444,407.44
  5. Step 5: Solve for x
    x = 15,252,444,407.44/135,399.40
  6. Step 6: Final answer
    x = 112,647.80

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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.