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Finding the Fourth Proportional to 136,371.87, 188,197.47 and 75,122.51

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Solution

The fourth proportional to 136,371.87, 188,197.47 and 75,122.51 is: 103,671.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,371.87 : 188,197.47 = 75,122.51 : x
  2. Step 2: Convert to fraction form
    136,371.87/188,197.47 = 75,122.51/x
  3. Step 3: Cross multiply
    136,371.87x = 188,197.47 × 75,122.51
  4. Step 4: Simplify right side
    136,371.87x = 14,137,865,005.45
  5. Step 5: Solve for x
    x = 14,137,865,005.45/136,371.87
  6. Step 6: Final answer
    x = 103,671.42

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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.