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Finding the Fourth Proportional to 73,145.66, 100,940.42 and 39,611.66

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Solution

The fourth proportional to 73,145.66, 100,940.42 and 39,611.66 is: 54,663.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,145.66 : 100,940.42 = 39,611.66 : x
  2. Step 2: Convert to fraction form
    73,145.66/100,940.42 = 39,611.66/x
  3. Step 3: Cross multiply
    73,145.66x = 100,940.42 × 39,611.66
  4. Step 4: Simplify right side
    73,145.66x = 3,998,417,597.30
  5. Step 5: Solve for x
    x = 3,998,417,597.30/73,145.66
  6. Step 6: Final answer
    x = 54,663.77

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1.5x scale

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.