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Finding the Fourth Proportional to 100,573.44, 138,791.40 and 55,861.44

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Solution

The fourth proportional to 100,573.44, 138,791.40 and 55,861.44 is: 77,088.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,573.44 : 138,791.40 = 55,861.44 : x
  2. Step 2: Convert to fraction form
    100,573.44/138,791.40 = 55,861.44/x
  3. Step 3: Cross multiply
    100,573.44x = 138,791.40 × 55,861.44
  4. Step 4: Simplify right side
    100,573.44x = 7,753,087,463.62
  5. Step 5: Solve for x
    x = 7,753,087,463.62/100,573.44
  6. Step 6: Final answer
    x = 77,088.82

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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.