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Finding the Fourth Proportional to 100,126.87, 138,174.71 and 54,186.41

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Solution

The fourth proportional to 100,126.87, 138,174.71 and 54,186.41 is: 74,777.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,126.87 : 138,174.71 = 54,186.41 : x
  2. Step 2: Convert to fraction form
    100,126.87/138,174.71 = 54,186.41/x
  3. Step 3: Cross multiply
    100,126.87x = 138,174.71 × 54,186.41
  4. Step 4: Simplify right side
    100,126.87x = 7,487,191,562.20
  5. Step 5: Solve for x
    x = 7,487,191,562.20/100,126.87
  6. Step 6: Final answer
    x = 74,777.05

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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.