Home / 138,768.81-191,505.60-85,043.45

Finding the Fourth Proportional to 138,768.81, 191,505.60 and 85,043.45

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Solution

The fourth proportional to 138,768.81, 191,505.60 and 85,043.45 is: 117,362.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,768.81 : 191,505.60 = 85,043.45 : x
  2. Step 2: Convert to fraction form
    138,768.81/191,505.60 = 85,043.45/x
  3. Step 3: Cross multiply
    138,768.81x = 191,505.60 × 85,043.45
  4. Step 4: Simplify right side
    138,768.81x = 16,286,297,397.08
  5. Step 5: Solve for x
    x = 16,286,297,397.08/138,768.81
  6. Step 6: Final answer
    x = 117,362.81

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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.