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Finding the Fourth Proportional to 81,323.34, 121,790.49 and 51,648.30

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Solution

The fourth proportional to 81,323.34, 121,790.49 and 51,648.30 is: 77,348.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,323.34 : 121,790.49 = 51,648.30 : x
  2. Step 2: Convert to fraction form
    81,323.34/121,790.49 = 51,648.30/x
  3. Step 3: Cross multiply
    81,323.34x = 121,790.49 × 51,648.30
  4. Step 4: Simplify right side
    81,323.34x = 6,290,271,764.67
  5. Step 5: Solve for x
    x = 6,290,271,764.67/81,323.34
  6. Step 6: Final answer
    x = 77,348.91

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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.