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Finding the Fourth Proportional to 138,912.85, 191,700.32 and 75,250.64

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Solution

The fourth proportional to 138,912.85, 191,700.32 and 75,250.64 is: 103,846.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,912.85 : 191,700.32 = 75,250.64 : x
  2. Step 2: Convert to fraction form
    138,912.85/191,700.32 = 75,250.64/x
  3. Step 3: Cross multiply
    138,912.85x = 191,700.32 × 75,250.64
  4. Step 4: Simplify right side
    138,912.85x = 14,425,571,768.20
  5. Step 5: Solve for x
    x = 14,425,571,768.20/138,912.85
  6. Step 6: Final answer
    x = 103,846.20

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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.