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Finding the Fourth Proportional to 100,064.37, 138,129.91 and 67,843.12

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Solution

The fourth proportional to 100,064.37, 138,129.91 and 67,843.12 is: 93,651.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,064.37 : 138,129.91 = 67,843.12 : x
  2. Step 2: Convert to fraction form
    100,064.37/138,129.91 = 67,843.12/x
  3. Step 3: Cross multiply
    100,064.37x = 138,129.91 × 67,843.12
  4. Step 4: Simplify right side
    100,064.37x = 9,371,164,059.72
  5. Step 5: Solve for x
    x = 9,371,164,059.72/100,064.37
  6. Step 6: Final answer
    x = 93,651.36

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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.