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Finding the Fourth Proportional to 73,145.74, 100,940.67 and 39,611.50

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Solution

The fourth proportional to 73,145.74, 100,940.67 and 39,611.50 is: 54,663.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,145.74 : 100,940.67 = 39,611.50 : x
  2. Step 2: Convert to fraction form
    73,145.74/100,940.67 = 39,611.50/x
  3. Step 3: Cross multiply
    73,145.74x = 100,940.67 × 39,611.50
  4. Step 4: Simplify right side
    73,145.74x = 3,998,411,349.71
  5. Step 5: Solve for x
    x = 3,998,411,349.71/73,145.74
  6. Step 6: Final answer
    x = 54,663.63

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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.