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Finding the Fourth Proportional to 127,958.89, 191,856.12 and 53,130.70

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Solution

The fourth proportional to 127,958.89, 191,856.12 and 53,130.70 is: 79,661.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,958.89 : 191,856.12 = 53,130.70 : x
  2. Step 2: Convert to fraction form
    127,958.89/191,856.12 = 53,130.70/x
  3. Step 3: Cross multiply
    127,958.89x = 191,856.12 × 53,130.70
  4. Step 4: Simplify right side
    127,958.89x = 10,193,449,954.88
  5. Step 5: Solve for x
    x = 10,193,449,954.88/127,958.89
  6. Step 6: Final answer
    x = 79,661.91

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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.