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Finding the Fourth Proportional to 136,489.87, 188,357.40 and 75,238.24

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Solution

The fourth proportional to 136,489.87, 188,357.40 and 75,238.24 is: 103,829.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,489.87 : 188,357.40 = 75,238.24 : x
  2. Step 2: Convert to fraction form
    136,489.87/188,357.40 = 75,238.24/x
  3. Step 3: Cross multiply
    136,489.87x = 188,357.40 × 75,238.24
  4. Step 4: Simplify right side
    136,489.87x = 14,171,679,679.01
  5. Step 5: Solve for x
    x = 14,171,679,679.01/136,489.87
  6. Step 6: Final answer
    x = 103,829.53

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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.