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Finding the Fourth Proportional to 72,669.96, 108,862.79 and 47,633.60

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Solution

The fourth proportional to 72,669.96, 108,862.79 and 47,633.60 is: 71,357.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,669.96 : 108,862.79 = 47,633.60 : x
  2. Step 2: Convert to fraction form
    72,669.96/108,862.79 = 47,633.60/x
  3. Step 3: Cross multiply
    72,669.96x = 108,862.79 × 47,633.60
  4. Step 4: Simplify right side
    72,669.96x = 5,185,526,627.73
  5. Step 5: Solve for x
    x = 5,185,526,627.73/72,669.96
  6. Step 6: Final answer
    x = 71,357.22

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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.