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Finding the Fourth Proportional to 128,675.66, 192,947.64 and 53,775.34

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Solution

The fourth proportional to 128,675.66, 192,947.64 and 53,775.34 is: 80,635.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,675.66 : 192,947.64 = 53,775.34 : x
  2. Step 2: Convert to fraction form
    128,675.66/192,947.64 = 53,775.34/x
  3. Step 3: Cross multiply
    128,675.66x = 192,947.64 × 53,775.34
  4. Step 4: Simplify right side
    128,675.66x = 10,375,824,943.20
  5. Step 5: Solve for x
    x = 10,375,824,943.20/128,675.66
  6. Step 6: Final answer
    x = 80,635.49

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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.