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Finding the Fourth Proportional to 72,196.60, 108,211.98 and 45,191.08

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Solution

The fourth proportional to 72,196.60, 108,211.98 and 45,191.08 is: 67,734.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,196.60 : 108,211.98 = 45,191.08 : x
  2. Step 2: Convert to fraction form
    72,196.60/108,211.98 = 45,191.08/x
  3. Step 3: Cross multiply
    72,196.60x = 108,211.98 × 45,191.08
  4. Step 4: Simplify right side
    72,196.60x = 4,890,216,245.14
  5. Step 5: Solve for x
    x = 4,890,216,245.14/72,196.60
  6. Step 6: Final answer
    x = 67,734.72

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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.