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Finding the Fourth Proportional to 101,021.35, 139,408.80 and 55,080.98

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Solution

The fourth proportional to 101,021.35, 139,408.80 and 55,080.98 is: 76,011.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,021.35 : 139,408.80 = 55,080.98 : x
  2. Step 2: Convert to fraction form
    101,021.35/139,408.80 = 55,080.98/x
  3. Step 3: Cross multiply
    101,021.35x = 139,408.80 × 55,080.98
  4. Step 4: Simplify right side
    101,021.35x = 7,678,773,324.62
  5. Step 5: Solve for x
    x = 7,678,773,324.62/101,021.35
  6. Step 6: Final answer
    x = 76,011.39

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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.