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Finding the Fourth Proportional to 101,290.62, 139,825.11 and 69,622.86

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Solution

The fourth proportional to 101,290.62, 139,825.11 and 69,622.86 is: 96,109.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,290.62 : 139,825.11 = 69,622.86 : x
  2. Step 2: Convert to fraction form
    101,290.62/139,825.11 = 69,622.86/x
  3. Step 3: Cross multiply
    101,290.62x = 139,825.11 × 69,622.86
  4. Step 4: Simplify right side
    101,290.62x = 9,735,024,058.01
  5. Step 5: Solve for x
    x = 9,735,024,058.01/101,290.62
  6. Step 6: Final answer
    x = 96,109.83

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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.