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Finding the Fourth Proportional to 127,015.55, 190,484.41 and 87,824.51

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Solution

The fourth proportional to 127,015.55, 190,484.41 and 87,824.51 is: 131,709.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,015.55 : 190,484.41 = 87,824.51 : x
  2. Step 2: Convert to fraction form
    127,015.55/190,484.41 = 87,824.51/x
  3. Step 3: Cross multiply
    127,015.55x = 190,484.41 × 87,824.51
  4. Step 4: Simplify right side
    127,015.55x = 16,729,199,970.89
  5. Step 5: Solve for x
    x = 16,729,199,970.89/127,015.55
  6. Step 6: Final answer
    x = 131,709.86

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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.