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Finding the Fourth Proportional to 127,040.64, 175,236 and 81,777.76

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Solution

The fourth proportional to 127,040.64, 175,236 and 81,777.76 is: 112,801.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,040.64 : 175,236 = 81,777.76 : x
  2. Step 2: Convert to fraction form
    127,040.64/175,236 = 81,777.76/x
  3. Step 3: Cross multiply
    127,040.64x = 175,236 × 81,777.76
  4. Step 4: Simplify right side
    127,040.64x = 14,330,407,551.36
  5. Step 5: Solve for x
    x = 14,330,407,551.36/127,040.64
  6. Step 6: Final answer
    x = 112,801.76

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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.