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Finding the Fourth Proportional to 70,959.82, 106,408.84 and 20,347.69

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Solution

The fourth proportional to 70,959.82, 106,408.84 and 20,347.69 is: 30,512.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,959.82 : 106,408.84 = 20,347.69 : x
  2. Step 2: Convert to fraction form
    70,959.82/106,408.84 = 20,347.69/x
  3. Step 3: Cross multiply
    70,959.82x = 106,408.84 × 20,347.69
  4. Step 4: Simplify right side
    70,959.82x = 2,165,174,089.58
  5. Step 5: Solve for x
    x = 2,165,174,089.58/70,959.82
  6. Step 6: Final answer
    x = 30,512.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.