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Finding the Fourth Proportional to 72,374.80, 108,331.80 and 51,638.80

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Solution

The fourth proportional to 72,374.80, 108,331.80 and 51,638.80 is: 77,293.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,374.80 : 108,331.80 = 51,638.80 : x
  2. Step 2: Convert to fraction form
    72,374.80/108,331.80 = 51,638.80/x
  3. Step 3: Cross multiply
    72,374.80x = 108,331.80 × 51,638.80
  4. Step 4: Simplify right side
    72,374.80x = 5,594,124,153.84
  5. Step 5: Solve for x
    x = 5,594,124,153.84/72,374.80
  6. Step 6: Final answer
    x = 77,293.81

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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.