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Finding the Fourth Proportional to 73,125.80, 109,688.70 and 72,434.60

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Solution

The fourth proportional to 73,125.80, 109,688.70 and 72,434.60 is: 108,651.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,125.80 : 109,688.70 = 72,434.60 : x
  2. Step 2: Convert to fraction form
    73,125.80/109,688.70 = 72,434.60/x
  3. Step 3: Cross multiply
    73,125.80x = 109,688.70 × 72,434.60
  4. Step 4: Simplify right side
    73,125.80x = 7,945,257,109.02
  5. Step 5: Solve for x
    x = 7,945,257,109.02/73,125.80
  6. Step 6: Final answer
    x = 108,651.90

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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.