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Finding the Fourth Proportional to 100,511.66, 138,726.60 and 58,064.42

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Solution

The fourth proportional to 100,511.66, 138,726.60 and 58,064.42 is: 80,140.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,511.66 : 138,726.60 = 58,064.42 : x
  2. Step 2: Convert to fraction form
    100,511.66/138,726.60 = 58,064.42/x
  3. Step 3: Cross multiply
    100,511.66x = 138,726.60 × 58,064.42
  4. Step 4: Simplify right side
    100,511.66x = 8,055,079,567.57
  5. Step 5: Solve for x
    x = 8,055,079,567.57/100,511.66
  6. Step 6: Final answer
    x = 80,140.75

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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.