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Finding the Fourth Proportional to 126,614.78, 189,852.05 and 51,787.47

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Solution

The fourth proportional to 126,614.78, 189,852.05 and 51,787.47 is: 77,652.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,614.78 : 189,852.05 = 51,787.47 : x
  2. Step 2: Convert to fraction form
    126,614.78/189,852.05 = 51,787.47/x
  3. Step 3: Cross multiply
    126,614.78x = 189,852.05 × 51,787.47
  4. Step 4: Simplify right side
    126,614.78x = 9,831,957,117.31
  5. Step 5: Solve for x
    x = 9,831,957,117.31/126,614.78
  6. Step 6: Final answer
    x = 77,652.52

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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.