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Finding the Fourth Proportional to 101,433.12, 139,930.52 and 65,634.68

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Solution

The fourth proportional to 101,433.12, 139,930.52 and 65,634.68 is: 90,545.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,433.12 : 139,930.52 = 65,634.68 : x
  2. Step 2: Convert to fraction form
    101,433.12/139,930.52 = 65,634.68/x
  3. Step 3: Cross multiply
    101,433.12x = 139,930.52 × 65,634.68
  4. Step 4: Simplify right side
    101,433.12x = 9,184,294,902.43
  5. Step 5: Solve for x
    x = 9,184,294,902.43/101,433.12
  6. Step 6: Final answer
    x = 90,545.33

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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.