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Finding the Fourth Proportional to 128,895.76, 193,371.72 and 52,994.85

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Solution

The fourth proportional to 128,895.76, 193,371.72 and 52,994.85 is: 79,503.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,895.76 : 193,371.72 = 52,994.85 : x
  2. Step 2: Convert to fraction form
    128,895.76/193,371.72 = 52,994.85/x
  3. Step 3: Cross multiply
    128,895.76x = 193,371.72 × 52,994.85
  4. Step 4: Simplify right side
    128,895.76x = 10,247,705,295.64
  5. Step 5: Solve for x
    x = 10,247,705,295.64/128,895.76
  6. Step 6: Final answer
    x = 79,503.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.