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Finding the Fourth Proportional to 72,186.08, 108,290.80 and 22,254.50

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Solution

The fourth proportional to 72,186.08, 108,290.80 and 22,254.50 is: 33,385.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,186.08 : 108,290.80 = 22,254.50 : x
  2. Step 2: Convert to fraction form
    72,186.08/108,290.80 = 22,254.50/x
  3. Step 3: Cross multiply
    72,186.08x = 108,290.80 × 22,254.50
  4. Step 4: Simplify right side
    72,186.08x = 2,409,957,608.60
  5. Step 5: Solve for x
    x = 2,409,957,608.60/72,186.08
  6. Step 6: Final answer
    x = 33,385.35

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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.