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Finding the Fourth Proportional to 128,017.89, 191,944.62 and 53,189.73

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Solution

The fourth proportional to 128,017.89, 191,944.62 and 53,189.73 is: 79,750.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017.89 : 191,944.62 = 53,189.73 : x
  2. Step 2: Convert to fraction form
    128,017.89/191,944.62 = 53,189.73/x
  3. Step 3: Cross multiply
    128,017.89x = 191,944.62 × 53,189.73
  4. Step 4: Simplify right side
    128,017.89x = 10,209,482,512.75
  5. Step 5: Solve for x
    x = 10,209,482,512.75/128,017.89
  6. Step 6: Final answer
    x = 79,750.44

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1.5x scale

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.