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Finding the Fourth Proportional to 101,102.29, 139,520.28 and 55,780.68

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Solution

The fourth proportional to 101,102.29, 139,520.28 and 55,780.68 is: 76,976.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,102.29 : 139,520.28 = 55,780.68 : x
  2. Step 2: Convert to fraction form
    101,102.29/139,520.28 = 55,780.68/x
  3. Step 3: Cross multiply
    101,102.29x = 139,520.28 × 55,780.68
  4. Step 4: Simplify right side
    101,102.29x = 7,782,535,394.59
  5. Step 5: Solve for x
    x = 7,782,535,394.59/101,102.29
  6. Step 6: Final answer
    x = 76,976.85

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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.