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Finding the Fourth Proportional to 138,912.60, 191,698.92 and 75,250.32

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Solution

The fourth proportional to 138,912.60, 191,698.92 and 75,250.32 is: 103,845.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,912.60 : 191,698.92 = 75,250.32 : x
  2. Step 2: Convert to fraction form
    138,912.60/191,698.92 = 75,250.32/x
  3. Step 3: Cross multiply
    138,912.60x = 191,698.92 × 75,250.32
  4. Step 4: Simplify right side
    138,912.60x = 14,425,405,073.65
  5. Step 5: Solve for x
    x = 14,425,405,073.65/138,912.60
  6. Step 6: Final answer
    x = 103,845.19

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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.