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Finding the Fourth Proportional to 100,960.60, 139,324.98 and 55,638.94

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Solution

The fourth proportional to 100,960.60, 139,324.98 and 55,638.94 is: 76,781.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,960.60 : 139,324.98 = 55,638.94 : x
  2. Step 2: Convert to fraction form
    100,960.60/139,324.98 = 55,638.94/x
  3. Step 3: Cross multiply
    100,960.60x = 139,324.98 × 55,638.94
  4. Step 4: Simplify right side
    100,960.60x = 7,751,894,202.72
  5. Step 5: Solve for x
    x = 7,751,894,202.72/100,960.60
  6. Step 6: Final answer
    x = 76,781.38

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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.