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Finding the Fourth Proportional to 100,895.50, 139,245.61 and 75,357.53

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Solution

The fourth proportional to 100,895.50, 139,245.61 and 75,357.53 is: 104,000.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,895.50 : 139,245.61 = 75,357.53 : x
  2. Step 2: Convert to fraction form
    100,895.50/139,245.61 = 75,357.53/x
  3. Step 3: Cross multiply
    100,895.50x = 139,245.61 × 75,357.53
  4. Step 4: Simplify right side
    100,895.50x = 10,493,205,769.45
  5. Step 5: Solve for x
    x = 10,493,205,769.45/100,895.50
  6. Step 6: Final answer
    x = 104,000.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.